Fix changelog codestyle

Author: mathbunnyru

CHANGELOG.md

@@ -7,7 +7,7 @@ All image manifests can be found in [the wiki](https://github.com/jupyter/docker
 
 Affected: all images.
 
-- **Non-breaking:**: Better tagging directory structure ([#2228](https://github.com/jupyter/docker-stacks/pull/2228)).
+- **Non-breaking:** Better tagging directory structure ([#2228](https://github.com/jupyter/docker-stacks/pull/2228)).
 
 ## 2025-02-18