Fix a typo in the CHANGELOG

`2.9.5 -> 2.9.1` — I missed this during review.

Author: henrymercer

CHANGELOG.md

@@ -6,7 +6,7 @@ No user facing changes.
 
 ## 2.1.10 - 10 May 2022
 
-- Update default CodeQL bundle version to 2.9.5. [#1056](https://github.com/github/codeql-action/pull/1056)
+- Update default CodeQL bundle version to 2.9.1. [#1056](https://github.com/github/codeql-action/pull/1056)
 - When `wait-for-processing` is enabled, the workflow will now fail if there were any errors that occurred during processing of the analysis results.
 
 ## 2.1.9 - 27 Apr 2022