help: Update help docs for changing stream permission settings.

We changed the stream permission settings UI for setting widgets
to always be present in "General" section instead of a modal.
This commit updates the help center documentation to be consistent
with the new UI.

Fixes #19519.

templates/zerver/help/change-the-privacy-of-a-stream.md

@@ -21,10 +21,7 @@ public.
 
 {!select-stream-view-general.md!}
 
-1. Click the **pencil** (<i class="fa fa-pencil"></i>)
+1. Under **Stream permissions**, configure **Who can access the stream**.
-   to the right of **Stream permissions**.
-
-1. Under **Who can access the stream?**, select a privacy level.
 
 {!save-changes.md!}
 

templates/zerver/help/message-retention-policy.md

@@ -46,10 +46,7 @@ Standard hosting.
 
 {!select-stream-view-general.md!}
 
-1. Click the **pencil** (<i class="fa fa-pencil"></i>)
+1. Under **Stream permissions**, configure the
-   to the right of **Stream permissions**.
-
-1. Under **Message retention for stream**, configure
    **Message retention period**.
 
 {!save-changes.md!}

templates/zerver/help/stream-sending-policy.md

@@ -15,10 +15,7 @@ certain users can send messages.
 
 {!select-stream-view-general.md!}
 
-1. Click the **pencil** (<i class="fa fa-pencil"></i>)
+1. Under **Stream permissions**, configure **Who can post to the stream**.
-   to the right of **Stream permissions**.
-
-1. Under **Who can post to the stream?**, select the option you prefer.
 
 {!save-changes.md!}