Bump dependabot/fetch-metadata from 3.0.0 to 3.1.0

Bumps [dependabot/fetch-metadata](https://github.com/dependabot/fetch-metadata) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/dependabot/fetch-metadata/releases)
- [Commits](dependabot/fetch-metadata@v3.0.0...v3.1.0)

---
updated-dependencies:
- dependency-name: dependabot/fetch-metadata
  dependency-version: 3.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/auto-merge.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: dependabot-metadata
-        uses: dependabot/fetch-metadata@v3.0.0
+        uses: dependabot/fetch-metadata@v3.1.0
 
       - name: Approve a PR
         if: steps.dependabot-metadata.outputs.update-type != 'version-update:semver-major'