Fix commit permissions for github actions

Author: sakusaku3939

.github/workflows/generate_webview_screenshots.yml

@@ -3,13 +3,18 @@ name: Generate WebView Screenshots
 on:
   workflow_dispatch:
 
+permissions:
+  contents: write
+
 jobs:
   generate-screenshots:
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          persist-credentials: true
 
       - name: Set up JDK 17
         uses: actions/setup-java@v4