Refactor: Update nightly release workflow to count new commits

This commit updates the nightly release workflow to accurately count new commits.

- Adds a checkout step with `fetch-depth: 0` to ensure all commits are fetched.
- Uses `git log` to count the number of commits made in the last 24 hours.

.github/workflows/nightly_release.yaml

@@ -11,6 +11,10 @@ jobs:
     name: Check for new commits
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # Required to count the commits
       - name: Get new commits
         run: echo "NEW_COMMIT_COUNT=$(git log --oneline --since '24 hours ago' | wc -l)" >> $GITHUB_ENV