Fix: Bot PRs need approving review before they can be merged

I missed this before, but because we have it as a requirement that PRs need an approving review, the bot PRs are still not being auto-merged.

This change should fix that.

.github/workflows/auto-merge.yml

@@ -13,7 +13,9 @@ jobs:
     if: ${{ github.event.pull_request.user.login == 'dependabot[bot]' || github.event.pull_request.user.login == 'pre-commit-ci[bot]' }}
     steps:
       - name: Enable auto-merge for Dependabot PRs
-        run: gh pr merge --auto --merge "$PR_URL"
+        run: |
+          gh pr review --approve "$PR_URL"
+          gh pr merge --auto --merge "$PR_URL"
         env:
           PR_URL: ${{github.event.pull_request.html_url}}
           # GitHub provides this variable in the CI env. You don't