Reduce unnecessary duplication of changelog verifier GHA runs (#646)

Signed-off-by: Daniel Widdis <[email protected]>

Author: dbwiddis

.github/workflows/changelog_verifier.yml

@@ -6,7 +6,7 @@ on:
       - 'backport/**'
   pull_request:
     branches: main
-    types: [opened, edited, review_requested, synchronize, reopened, ready_for_review, labeled, unlabeled]
+    types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
 
 jobs:
   # Enforces the update of a changelog file on every pull request