Bump dependabot/fetch-metadata from 1.6.0 to 2.0.0

Bumps [dependabot/fetch-metadata](https://github.com/dependabot/fetch-metadata) from 1.6.0 to 2.0.0.
- [Release notes](https://github.com/dependabot/fetch-metadata/releases)
- [Commits](dependabot/fetch-metadata@v1.6.0...v2.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/merge.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: dependabot-metadata
-        uses: dependabot/fetch-metadata@v1.6.0
+        uses: dependabot/fetch-metadata@v2.0.0
       - name: Enable auto-merge for Dependabot PRs
         if: ${{ steps.dependabot-metadata.outputs.update-type != 'version-update:semver-major' }}
         run: gh pr merge --auto --merge "$PR_URL"