docs: Update CZO links from stream to channel in docs and comments.

Updates all the https://chat.zulip.org/#narrow/stream/ links in the
docs and comments to use the new /channel/ path. All these links are
for documentation/reference purposes only and thus, can be bulk-updated.

This commit is a part of the effort to rename stream to channel.

docs/contributing/code-reviewing.md

@@ -297,7 +297,7 @@ also some additional ways to ask for a code review:
   can also include a link to this guide.
 
 - If you're not sure who to ask, you can post a message in
-  [#code-review](https://chat.zulip.org/#narrow/stream/91-code-review) on [the Zulip
+  [#code-review](https://chat.zulip.org/#narrow/channel/91-code-review) on [the Zulip
   development community server](https://zulip.com/development-community/) to reach
   out to a wider group of potential reviewers.
 

docs/contributing/code-style.md

@@ -45,7 +45,7 @@ to do the same thing. If you think the other code has actively bad
 style, fix it (in a separate commit).
 
 When in doubt, ask in
-[#development help](https://chat.zulip.org/#narrow/stream/49-development-help).
+[#development help](https://chat.zulip.org/#narrow/channel/49-development-help).
 
 ### Use the linters
 

docs/contributing/design-discussions.md

@@ -11,9 +11,9 @@ perspectives, respectfully shared.
 
 Most design discussions take place in the [#design][design channel] channel in the
 development community. Discussions about mobile app design happen in
-[#mobile-team](https://chat.zulip.org/#narrow/stream/243-mobile-team), and
+[#mobile-team](https://chat.zulip.org/#narrow/channel/243-mobile-team), and
 design of the terminal app is discussed in
-[#zulip-terminal](https://chat.zulip.org/#narrow/stream/206-zulip-terminal).
+[#zulip-terminal](https://chat.zulip.org/#narrow/channel/206-zulip-terminal).
 
 ## Guidelines for all participants
 
@@ -168,7 +168,7 @@ Sometimes it helps to move (part of) a thread to a different channel, so that
 it's seen by the appropriate audience.
 
 - We generally aim to discuss raw user feedback on the product’s design in
-  [#feedback](https://chat.zulip.org/#narrow/stream/137-feedback).
+  [#feedback](https://chat.zulip.org/#narrow/channel/137-feedback).
   The [#design][design channel] should be reserved for design aspects that we’re
   actively (considering) working on. This lets the design team focus on
   discussions that are expected to result in actionable decisions.
@@ -178,13 +178,13 @@ it's seen by the appropriate audience.
   follow the conversation.
 
 - Discussion of implementation-related decisions should ideally happen in
-  [#frontend](https://chat.zulip.org/#narrow/stream/6-frontend). The line can
+  [#frontend](https://chat.zulip.org/#narrow/channel/6-frontend). The line can
   sometimes blur (and that’s OK), but we should aim to move (parts of) the
   thread if there is an extensive conversation that belongs in the other channel.
 
-- We use [#mobile-team](https://chat.zulip.org/#narrow/stream/243-mobile-team)
+- We use [#mobile-team](https://chat.zulip.org/#narrow/channel/243-mobile-team)
   for discussions of mobile app design, and
-  [#zulip-terminal](https://chat.zulip.org/#narrow/stream/206-zulip-terminal) for
+  [#zulip-terminal](https://chat.zulip.org/#narrow/channel/206-zulip-terminal) for
   terminal app design.
 
 ## Guidelines for decision makers
@@ -268,4 +268,4 @@ to a decision:
   - If the thread has died down, and the decision makers feel that they have
     enough information to go on. (If they don’t, the thread can be bumped.)
 
-[design channel]: https://chat.zulip.org/#narrow/stream/101-design
+[design channel]: https://chat.zulip.org/#narrow/channel/101-design

docs/contributing/reporting-bugs.md

@@ -90,18 +90,18 @@ Steps and best practices for starting a conversation:
    community](https://zulip.com/development-community/) if you don't already
    have an account.
 2. Pick an **appropriate channel** to report your issue:
-   - [#issues](https://chat.zulip.org/#narrow/stream/9-issues) for issues with
+   - [#issues](https://chat.zulip.org/#narrow/channel/9-issues) for issues with
      the Zulip web app or server. Use this channel if you aren't sure which
      channel is most appropriate.
-   - [#mobile](https://chat.zulip.org/#narrow/stream/48-mobile) for issues with
+   - [#mobile](https://chat.zulip.org/#narrow/channel/48-mobile) for issues with
      the mobile apps.
-   - [#desktop](https://chat.zulip.org/#narrow/stream/16-desktop) for issues
+   - [#desktop](https://chat.zulip.org/#narrow/channel/16-desktop) for issues
      that are specific to the Zulip desktop app, and therefore _do not_
      occur in the web app.
-   - [#zulip-terminal](https://chat.zulip.org/#narrow/stream/206-zulip-terminal)
+   - [#zulip-terminal](https://chat.zulip.org/#narrow/channel/206-zulip-terminal)
      for issues with the terminal app.
    - [#production
-     help](https://chat.zulip.org/#narrow/stream/31-production-help) for issues
+     help](https://chat.zulip.org/#narrow/channel/31-production-help) for issues
      related to self-hosting Zulip. See the [troubleshooting
      guide](../production/troubleshooting.md) for additional details.
 3. **[Start a new topic](https://zulip.com/help/starting-a-new-topic)** for

docs/contributing/suggesting-features.md

@@ -34,17 +34,17 @@ Steps and best practices for starting a conversation:
    community](https://zulip.com/development-community/) if you don't already
    have an account.
 2. Pick an **appropriate channel** to discuss your idea:
-   - [#feedback](https://chat.zulip.org/#narrow/stream/137-feedback) for suggestions for
+   - [#feedback](https://chat.zulip.org/#narrow/channel/137-feedback) for suggestions for
      the Zulip web app or server. Use this channel if you aren't sure which channel is
      most appropriate.
-   - [#mobile](https://chat.zulip.org/#narrow/stream/48-mobile) for suggestions
+   - [#mobile](https://chat.zulip.org/#narrow/channel/48-mobile) for suggestions
      for the mobile apps.
-   - [#desktop](https://chat.zulip.org/#narrow/stream/16-desktop) for suggestions
+   - [#desktop](https://chat.zulip.org/#narrow/channel/16-desktop) for suggestions
      that are specific to the Zulip desktop app.
-   - [#zulip-terminal](https://chat.zulip.org/#narrow/stream/206-zulip-terminal)
+   - [#zulip-terminal](https://chat.zulip.org/#narrow/channel/206-zulip-terminal)
      for suggestions for the terminal app.
    - [#production
-     help](https://chat.zulip.org/#narrow/stream/31-production-help) for suggestions
+     help](https://chat.zulip.org/#narrow/channel/31-production-help) for suggestions
      related to self-hosting Zulip.
 3. **[Start a new topic](https://zulip.com/help/starting-a-new-topic)** for
    discussing your suggestions, using a brief summary of your idea as the