Use git status instead of git diff for change calculation (#21)

Author: KevinEady

.github/workflows/sync-headers.yml

@@ -27,7 +27,7 @@ jobs:
           echo $COMMIT_MESSAGE
           npm run --silent write-symbols
           npm run --silent write-win32-def
-          CHANGED_FILES=$(git diff --name-only)
+          CHANGED_FILES=$(git status -s)
           BRANCH_NAME="update-headers/${VERSION}"
           if [ -z "$CHANGED_FILES" ]; then
               echo "No changes exist. Nothing to do."