Update CHANGELOG

extensions/ql-vscode/CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## [UNRELEASED]
 
+- Add a prompt for downloading a GitHub database when opening a GitHub repository. [#3138](https://github.com/github/vscode-codeql/pull/3138)
 - Avoid showing a popup when hovering over source elements in database source files. [#3125](https://github.com/github/vscode-codeql/pull/3125)
 
 ## 1.11.0 - 13 December 2023