ci: Upgrade dependabot/fetch-metadata

Author: jpmckinney

.github/workflows/automerge.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - id: dependabot-metadata
-        uses: dependabot/fetch-metadata@v1
+        uses: dependabot/fetch-metadata@v2
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
       - if: ${{ steps.dependabot-metadata.outputs.update-type != 'version-update:semver-major' || steps.dependabot-metadata.outputs.package-ecosystem == 'github_actions' }}