Bump dependabot/fetch-metadata from 1.6.0 to 2.1.0

Bumps [dependabot/fetch-metadata](https://github.com/dependabot/fetch-metadata) from 1.6.0 to 2.1.0.
- [Release notes](https://github.com/dependabot/fetch-metadata/releases)
- [Commits](dependabot/fetch-metadata@v1.6.0...v2.1.0)

---
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/approve-dependencies.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v1.6.0
+        uses: dependabot/fetch-metadata@v2.1.0
       - name: Approve PR
         if: ${{contains(steps.metadata.outputs.dependency-names, 'AWSSDK.DynamoDBv2')}}
         run: gh pr review --approve "$PR_URL"