fix: disable lock-pullrequest-aftermerge in CLA workflow

Author: aconite33

.github/workflows/cla.yml

@@ -65,3 +65,4 @@ jobs:
           allowlist: "dependabot[bot],github-actions[bot],renovate[bot]"
           remote-organization-name: "blacklanternsecurity"
           remote-repository-name: "CLA"
+          lock-pullrequest-aftermerge: "false"