chore: don't run cz if current commit is the same as the latest main …

…branch commit

dev/flake.nix

@@ -45,14 +45,14 @@
               default_branch=$(git remote show origin | grep 'HEAD branch' | cut -d' ' -f5)
 
               # Get the latest commit on the default branch
+              # rev range using the `default_branch` branch name (e.g. main..HEAD), doesn't work in Github Actions
               latest_default_commit=$(git rev-parse origin/"$default_branch")
 
-              commit_count=2
+              current_commit=$(git rev-parse HEAD)
 
-              if [ "$commit_count" -eq 0 ]; then
+              if [ "$latest_default_commit" = "$current_commit" ]; then
                   echo "No commits to check between $default_branch and HEAD."
               else
-                  echo "Checking $commit_count commit(s)..."
                   cz check --rev-range "$latest_default_commit"..HEAD
               fi
             '';