Bump dependabot/fetch-metadata from 1.1.1 to 2.4.0

Bumps [dependabot/fetch-metadata](https://github.com/dependabot/fetch-metadata) from 1.1.1 to 2.4.0.
- [Release notes](https://github.com/dependabot/fetch-metadata/releases)
- [Commits](dependabot/fetch-metadata@v1.1.1...v2.4.0)

---
updated-dependencies:
- dependency-name: dependabot/fetch-metadata
  dependency-version: 2.4.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/setup-automerge.yml

@@ -21,7 +21,7 @@ jobs:
         private_key: ${{ secrets.BOT_PRIVATE_KEY }}
     - name: metadata
       id: metadata
-      uses: dependabot/fetch-metadata@v1.1.1
+      uses: dependabot/fetch-metadata@v2.4.0
       with:
         github-token: ${{ steps.generate_token.outputs.token }}
     - name: Enable auto-merge for bot PRs