doc: update changelog to set minimal GitLab version requirements [skip-ci]

CHANGELOG.md

@@ -19,6 +19,7 @@
 ### Features
 
 * support CI/CD component design ([0166bd4](https://gitlab.com/to-be-continuous/python/commit/0166bd43891f4bab8934e4379e8c34f399d681f5))
+* **version**: minimal GitLab version requirements: 16.6
 
 ## [6.4.1](https://gitlab.com/to-be-continuous/python/compare/6.4.0...6.4.1) (2023-11-25)