Add a changelog entry for the Kotlin 1.9.10 support

Author: igfoo

CHANGELOG.md

@@ -5,6 +5,7 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 ## [UNRELEASED]
 
 - Fixed a bug in CodeQL Action 2.21.3 onwards that affected beta support for [Project Lombok](https://projectlombok.org/) when analyzing Java. The environment variable `CODEQL_EXTRACTOR_JAVA_RUN_ANNOTATION_PROCESSORS` will now be respected if it was manually configured in the workflow. [#1844](https://github.com/github/codeql-action/pull/1844)
+- Enable support for Kotlin 1.9.20 when running with CodeQL CLI v2.13.4 through v2.14.3. [#1853](https://github.com/github/codeql-action/pull/1853)
 
 ## 2.21.4 - 14 Aug 2023