Update mattermost-changelog.md

source/deploy/mattermost-changelog.md

@@ -19,6 +19,7 @@ From Mattermost v9.2, this changelog summarizes updates for the latest cloud and
 
 - **9.2.3, released **
   - Mattermost v9.2.3 contains low to medium severity level security fixes. [Upgrading](https://docs.mattermost.com/upgrade/upgrading-mattermost-server.html) to this release is recommended. Details will be posted on our [security updates page](https://mattermost.com/security-updates/) 30 days after release as per the [Mattermost Responsible Disclosure Policy](https://mattermost.com/security-vulnerability-report/).
+  - Mattermost v9.2.3 contains no database or functional changes.
   - Pre-packaged Calls plugin version [v0.21.1](https://github.com/mattermost/mattermost-plugin-calls/releases/tag/v0.21.1).
   - (Cloud) Fixed an issue where the **About Mattermost** dialog reported an incorrect server version.
 - **9.2.2, released 2023-11-08**