Update changelog

Author: aeisenberg

extensions/ql-vscode/CHANGELOG.md

@@ -2,7 +2,8 @@
 
 ## [UNRELEASED]
 
-- Emit a more explicit error message when a user tries to add a database with an unzipped source folder to the workspace. [1021](https://github.com/github/vscode-codeql/pull/1021)
+- Emit a more explicit error message when a user tries to add a database with an unzipped source folder to the workspace. [#1021](https://github.com/github/vscode-codeql/pull/1021)
+- Ensure `src.zip` archives are used as the canonical source instead of `src` folders when importing databases. [#1025](https://github.com/github/vscode-codeql/pull/1025)
 
 ## 1.5.7 - 23 November 2021