Drop ticket reference from changelog entry

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: lelia <2418071+lelia@users.noreply.github.com>

Author: lelia

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## 2.5.10
 
-### Changed: pin all Python dependencies (CE-359)
+### Changed: pin all Python dependencies
 
 - Pinned every runtime dependency in `pyproject.toml` to an exact version;
   several were previously unpinned or open ranges.