Add to changelog.

Author: starcke

extensions/ql-vscode/CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## [UNRELEASED]
 
+- It is now possible to show the language of query history items using the `%l` specifier in the `codeQL.queryHistory.format` setting. Note that this only works queries run after this upgrade, and older items will show `unknown` as a language. [#2892](https://github.com/github/vscode-codeql/pull/2892)
+
 ## 1.9.0 - 19 September 2023
 
 - Release the [CodeQL model editor](https://codeql.github.com/docs/codeql/codeql-for-visual-studio-code/using-the-codeql-model-editor) to create CodeQL model packs for Java frameworks. Open the editor using the "CodeQL: Open CodeQL Model Editor (Beta)" command. [#2823](https://github.com/github/vscode-codeql/pull/2823)