fix(extensions): correct formatting of updated_at timestamp

Author: vieiraae

extensions/catalog.community.json

@@ -2048,7 +2048,7 @@
       "downloads": 0,
       "stars": 0,
       "created_at": "2026-04-29T15:00:00Z",
-      "updated_at": "2026-04-29T15:00:00Z"      
+      "updated_at": "2026-04-29T15:00:00Z"
     },
     "speckit-utils": {
       "name": "SDD Utilities",