help: Link to dedicated articles vs getting org started guide.

As the guide to getting an organization started is being replaced
by the moving to zulip guide, replace links to subsections of the
old guide to instead go to dedicated articles about those topics.

docs/production/install.md

@@ -8,7 +8,7 @@ You can choose from several convenient options for hosting Zulip:
   [DigitalOcean droplet](https://marketplace.digitalocean.com/apps/zulip?refcode=3ee45da8ee26)
 - Use Zulip's [experimental Docker image](deployment.md#zulip-in-docker).
 - Use [Zulip Cloud](https://zulip.com/plans/) hosting. Read our [guide to choosing between Zulip Cloud and
-  self-hosting](https://zulip.com/help/getting-your-organization-started-with-zulip#choosing-between-zulip-cloud-and-self-hosting).
+  self-hosting](https://zulip.com/help/zulip-cloud-or-self-hosting).
 
 To **import data** from [Slack][slack-import], [Mattermost][mattermost-import], [Rocket.Chat][rocketchat-import], [Zulip Cloud][zulip-cloud-import], or [another Zulip
 server][zulip-server-import], follow the linked instructions.

web/templates/stream_settings/stream_settings_overlay.hbs

@@ -68,7 +68,7 @@
                     <span class="settings-empty-option-text">
                         {{#tr}}
                             First time? Read our <z-link>guidelines</z-link> for creating and naming channels.
-                            {{#*inline "z-link"}}<a href="/help/getting-your-organization-started-with-zulip#create-channels" target="_blank" rel="noopener noreferrer">{{> @partial-block}}</a>{{/inline}}
+                            {{#*inline "z-link"}}<a href="/help/create-channels" target="_blank" rel="noopener noreferrer">{{> @partial-block}}</a>{{/inline}}
                         {{/tr}}
                     </span>
                     {{else}}