Fix typo in changelog section header

Author: stacy-qqq

docs/changelog.md

@@ -9,7 +9,7 @@ To use the latest version of Devvit:
 
 **Please note**: you may see features available across Devvit packages that are not documented or noted in our changelog. These are experimental features that are not stable and are subject to change, or removal, from the platform. Please use caution when testing or implementing experimental features.
 
-## Devvit 0.12.14:  Community Game Pro Tips , Platform Changes, and Fixes
+## Devvit 0.12.14:  Community Game Pro Tips, Platform Changes, and Fixes
 **Release Date: Mar 9, 2026**   
 
 This release brings new guidance to help you build more engaging community games, along with important platform updates and several developer experience improvements.