Add noteworthy changes to changelog

Author: mbg

CHANGELOG.md

@@ -4,7 +4,10 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 
 ## 4.31.11 - 23 Jan 2026
 
-No user facing changes.
+- When running a Default Setup workflow with [Actions debugging enabled](https://docs.github.com/en/actions/how-tos/monitor-workflows/enable-debug-logging), the CodeQL Action will now use more unique names when uploading logs from the Dependabot authentication proxy as workflow artifacts. This ensures that the artifact names do not clash between multiple jobs in a build matrix. [#3409](https://github.com/github/codeql-action/pull/3409)
+- Improved error handling throughout the CodeQL Action. [#3415](https://github.com/github/codeql-action/pull/3415)
+- Added experimental support for automatically excluding [generated files](https://docs.github.com/en/repositories/working-with-files/managing-files/customizing-how-changed-files-appear-on-github) from the analysis. This feature is not currently enabled for any analysis. In the future, it may be enabled by default for some GitHub-managed analyses. [#3318](https://github.com/github/codeql-action/pull/3318)
+- The changelog extracts that are included with releases of the CodeQL Action are now shorter to avoid duplicated information from appearing in Dependabot PRs. [#3403](https://github.com/github/codeql-action/pull/3403)
 
 ## 4.31.10 - 12 Jan 2026