ci:为 update-manifest job 添加仓库写权限

- 在 GitHub Actions 工作流中为 update-manifest job 添加 contents: write权限
- 这个修改是为了确保 job 能够正确更新仓库中的 manifests

.github/workflows/docker-publish.yml

@@ -143,6 +143,8 @@ jobs:
   update-manifest:
     runs-on: ubuntu-latest
     needs: ["build"]
+    permissions:
+      contents: write
     steps:
       - name: Checkout manifest
         if: github.event_name == 'push'