Update changelog for v3.28.1

Author: github-actions[bot]

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 See the [releases page](https://github.com/github/codeql-action/releases) for the relevant changes to the CodeQL CLI and language packs.
 
-## [UNRELEASED]
+## 3.28.1 - 10 Jan 2025
 
 - CodeQL Action v2 is now deprecated, and is no longer updated or supported. For better performance, improved security, and new features, upgrade to v3. For more information, see [this changelog post](https://github.blog/changelog/2025-01-10-code-scanning-codeql-action-v2-is-now-deprecated/). [#2677](https://github.com/github/codeql-action/pull/2677)
 - Update default CodeQL bundle version to 2.20.1. [#2678](https://github.com/github/codeql-action/pull/2678)