Merge pull request #2937 from ruby/dependabot/github_actions/dependabot/fetch-metadata-3.1.0

Bump dependabot/fetch-metadata from 3.0.0 to 3.1.0

Author: soutaro

.github/workflows/dependabot.yml

@@ -14,7 +14,7 @@ jobs:
     if: ${{ github.event.pull_request.user.login == 'dependabot[bot]' }}
     steps:
       - name: Dependabot metadata
-        uses: dependabot/fetch-metadata@ffa630c65fa7e0ecfa0625b5ceda64399aea1b36 # v3.0.0
+        uses: dependabot/fetch-metadata@25dd0e34f4fe68f24cc83900b1fe3fe149efef98 # v3.1.0
         id: metadata
       - name: Checkout repository
         uses: actions/checkout@v6