Add changelog note

Author: henrymercer

CHANGELOG.md

@@ -6,7 +6,7 @@ Note that the only difference between `v2` and `v3` of the CodeQL Action is the
 
 ## [UNRELEASED]
 
-No user facing changes.
+- Improve the ease of debugging extraction issues by increasing the verbosity of the extractor logs when running in debug mode. [#2195](https://github.com/github/codeql-action/pull/2195)
 
 ## 3.24.7 - 12 Mar 2024