Use dependabot/fetch-metadata@v2.2.0

Author: velo

.github/workflows/auto-merge-dependabot.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: metadata
-        uses: dependabot/fetch-metadata@4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c3d
+        uses: dependabot/fetch-metadata@v2.2.0
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Enable auto-merge for Dependabot PRs