fix: pin dependabot action version and clean up formatting

Co-authored-by: molvqingtai <26295698+molvqingtai@users.noreply.github.com>

Author: Copilot

.github/workflows/dependabot-auto-merge.yml

@@ -15,13 +15,13 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v2
+        uses: dependabot/fetch-metadata@v2.2.0
         with:
           github-token: '${{ secrets.GITHUB_TOKEN }}'
 
       - name: Enable auto-merge for minor and patch updates
         if: |
-          steps.metadata.outputs.update-type == 'version-update:semver-minor' || 
+          steps.metadata.outputs.update-type == 'version-update:semver-minor' ||
           steps.metadata.outputs.update-type == 'version-update:semver-patch'
         run: gh pr merge --auto --squash "$PR_URL"
         env: