edited the changelog.yml trigger

.github/workflows/changelog.yml

@@ -9,7 +9,7 @@ on:
   pull_request:
     types: [opened, synchronize, reopened, labeled, unlabeled]
     branches:
-      - main
+      - aws-cwa-dev
 env:
   # Make sure to exit early if cache segment download times out after 2 minutes.
   # We limit cache download as a whole to 5 minutes.