Update changelog for v2.2.8

2023-03-22 18:32:36 +00:00 · 2023-03-22 18:32:36 +00:00 · 57571ab0cd
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -1,6 +1,6 @@
 # CodeQL Action Changelog

-## [UNRELEASED]
+## 2.2.8 - 22 Mar 2023

 - Update default CodeQL bundle version to 2.12.5. [#1585](https://github.com/github/codeql-action/pull/1585)