Update sync-upstream.yml

.github/workflows/sync-upstream.yml

@@ -5,13 +5,18 @@ on:
     - cron: '0 */4 * * *'  # 每4小时运行一次
   workflow_dispatch:      # 允许手动触发
 
+# 添加权限配置
+permissions:
+  contents: write
+  workflows: write  # 添加 workflows 写入权限
+
 jobs:
   sync:
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0