Fix release manifest name

Author: ChunyiLyu

.github/workflows/build-test-publish.yml

@@ -196,8 +196,8 @@ jobs:
       if: startsWith(github.ref, 'refs/tags/')
       with:
         files: |
-          messaging-topology-operator.yml
-          messaging-topology-operator-with-certmanager.yml
+          messaging-topology-operator.yaml
+          messaging-topology-operator-with-certmanager.yaml
         generate_release_notes: true
         draft: true
         fail_on_unmatched_files: true