fix automerge workflow

Author: brillout

.github/workflows/dependabot.yml

@@ -19,7 +19,7 @@ jobs:
         env:
           MERGE_METHOD: "squash"
           MERGE_COMMIT_MESSAGE: "pull-request-title"
-          MERGE_FILTER_AUTHOR: "dependabot"
+          MERGE_FILTER_AUTHOR: "dependabot[bot]"
           MERGE_LABELS: "dependencies"
           UPDATE_LABELS: "dependencies"
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"