fix: Correctly push submodule updates

.github/workflows/update_submodule.yaml

@@ -2,7 +2,7 @@ name: Update submodule
 
 on:
   schedule:
-    - cron: '0 0 * * *'
+    - cron: "0 0 * * *"
   workflow_dispatch:
 
 jobs:
@@ -13,13 +13,15 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
-          submodules: 'recursive'
+          submodules: "recursive"
 
       - name: Update submodule
         run: |
           git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-          git config --global user.name "github-actions[bot]"
+          git config user.name "github-actions[bot]"
           git submodule update --remote --recursive
-          git add .
-          git commit -m "Update linutil submodule" || exit 0
-          git push
+
+      - uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          commit_message: Update linutil submodule
+          file_pattern: "linutil/**"