changelog.txt: update.

Author: kivikakk

changelog.txt

@@ -1,9 +1,10 @@
 # [v0.31.0] - 26-11-2024
-## What's Changed
+
 * Enhance description lists by @digitalmoksha in https://github.com/kivikakk/comrak/pull/462
 
+Diff: https://github.com/kivikakk/comrak/compare/v0.30.0...v0.31.0
+
 
-**Full Changelog**: https://github.com/kivikakk/comrak/compare/v0.30.0...v0.31.0
 # [v0.30.0] - 22-11-2024
 
 * Add `task-list-item` class to task list items by @nicoburns in https://github.com/kivikakk/comrak/pull/468