Bump dependabot/fetch-metadata from 1 to 2 in /.github/workflows

Bumps [dependabot/fetch-metadata](https://github.com/dependabot/fetch-metadata) from 1 to 2.
- [Release notes](https://github.com/dependabot/fetch-metadata/releases)
- [Commits](dependabot/fetch-metadata@v1...v2)

---
updated-dependencies:
- dependency-name: dependabot/fetch-metadata
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

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

@@ -17,7 +17,7 @@ jobs:
       # will not occur.
       - name: "Dependabot metadata"
         id: "dependabot-metadata"
-        uses: "dependabot/fetch-metadata@v1"
+        uses: "dependabot/fetch-metadata@v2"
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
       # Here the PR gets approved.