Update changelog

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## [UNRELEASED]
 
-No user facing changes.
+- Allow invalid URIs to be used as values to `artifactLocation.uri` properties. This reverses a change from [#1668](https://github.com/github/codeql-action/pull/1668) that inadvertently led to stricter validation of some URI values. [#1705](https://github.com/github/codeql-action/pull/1705)
 
 ## 2.3.4 - 24 May 2023