Update CHANGELOG

Author: koesie10

extensions/ql-vscode/CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [UNRELEASED]
 
 - Add a prompt to the "Quick query" command to encourage users in single-folder workspaces to use "Create query" instead. [#3082](https://github.com/github/vscode-codeql/pull/3082)
+- Remove support for CodeQL CLI versions older than 2.11.6. [#3087](https://github.com/github/vscode-codeql/pull/3087)
 
 ## 1.10.0 - 16 November 2023