fix: checkout repo for dependabot auto-merge

Author: Aethersailor

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

@@ -16,6 +16,10 @@ jobs:
       github.event.pull_request.draft == false
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
       - name: Enable auto-merge and delete branch
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}