fixed git user and email issue

Author: Petr Sramek

.github/workflows/apply-file-header.yml

@@ -39,7 +39,11 @@ jobs:
     - run: git add .
       name: Stage file header rule changes
       working-directory: ${{ github.workspace }}
-    - run: git commit -m "applied file header rule"
+    - run: |
+        git config user.name "$(git log -n 1 --pretty=format:%an)"
+        git config user.email "$(git log -n 1 --pretty=format:%ae)"
+      name: Set user and email from the last commit
+    - run: git commit -m "applied file header rule" 
       name: Commit file header rule changes
       working-directory: ${{ github.workspace }}
     - run: git push origin ${{ github.ref }}