Address incorrect CHANGELOG.md

The bundle update was removed from 3.26.1 and but back for the next release.

Co-authored-by: Henry Mercer <[email protected]>

Author: rvermeulen

CHANGELOG.md

@@ -6,11 +6,11 @@ Note that the only difference between `v2` and `v3` of the CodeQL Action is the
 
 ## [UNRELEASED]
 
-No user facing changes.
+- Update default CodeQL bundle version to 2.18.2. [#2417](https://github.com/github/codeql-action/pull/2417)
 
 ## 3.26.1 - 13 Aug 2024
 
-- Update default CodeQL bundle version to 2.18.2. [#2417](https://github.com/github/codeql-action/pull/2417)
+No user facing changes.
 
 ## 3.26.0 - 06 Aug 2024