📝 docs: add missing item in changelog for 8.34.0 version

Author: gaeljw

CHANGELOG.md

@@ -27,6 +27,7 @@ See also the [CHANGELOG](https://github.com/cucumber/cucumber-jvm/blob/master/CH
 ### Changed
 
 - [Core] Update `cucumber-core` dependency to [7.30.0](https://github.com/cucumber/cucumber-jvm/blob/main/CHANGELOG.md)
+- Upgrade Scala versions to 2.13.17
 
 ## [8.33.0] (2025-09-22)