docs: remove step to create discussion page

At least for now, the idea is to focus discussion towards
<https://community.grafana.com>, so discussions have been disabled in
the Alloy repo.

docs/developer/release/6-publish-release.md

@@ -15,15 +15,14 @@ This is how to publish the release in GitHub.
 3. Add a footer to the `Notable Changes` section:
 
     `For a full list of changes, please refer to the [CHANGELOG](https://github.com/grafana/agent/blob/RELEASE_VERSION/CHANGELOG.md)!`
-    
-    Do not substitute the value for `CHANGELOG`.  
+
+    Do not substitute the value for `CHANGELOG`.
 
 4. At the bottom of the release page, perform the following:
-    - Tick the check box to "add a discussion" under the category for "announcements".
     - For a Release Candidate, tick the checkbox to "pre-release".
     - For a Stable Release or Patch Release, tick the checkbox to "set as the latest release".
 
 5. Optionally, have other team members review the release draft if you wish
    to feel more comfortable with it.
 
-6. Publish the release!
+6. Publish the release!