Merge releases/v3 into releases/v2

CHANGELOG.md

@@ -4,6 +4,10 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 
 Note that the only difference between `v2` and `v3` of the CodeQL Action is the node version they support, with `v3` running on node 20 while we continue to release `v2` to support running on node 16. For example `3.22.11` was the first `v3` release and is functionally identical to `2.22.11`. This approach ensures an easy way to track exactly which features are included in different versions, indicated by the minor and patch version numbers.
 
+## 2.26.10 - 30 Sep 2024
+
+- We are rolling out a feature in September/October 2024 that sets up CodeQL using a bundle compressed with [Zstandard](http://facebook.github.io/zstd/). Our aim is to improve the performance of setting up CodeQL. [#2502](https://github.com/github/codeql-action/pull/2502)
+
 ## 2.26.9 - 24 Sep 2024
 
 No user facing changes.