chore: trial with dependabot ~ 2 (#556)

trial... again.

.github/workflows/dependabot_pr.yaml

@@ -17,8 +17,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
+          fetch-depth: 0
           token: ${{ secrets.DEPENDABOT_UPDATE_TOKEN }}
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event.pull_request.head.sha }}
 
       - name: Install Rust Toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -43,4 +44,4 @@ jobs:
           git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
           git remote set-url origin https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git
           git commit -am "chore(deps): cargo hakari"
-          git push
+          git push --force-with-lease origin HEAD:refs/heads/${{ github.head_ref }}