build: 为action声明permissions

.github/workflows/add-labels-for-pr.yml

@@ -2,6 +2,9 @@ on: pull_request
 
 name: MeterSphere 通用 PR 处理
 
+permissions:
+  pull-requests: read
+
 jobs:
   generic_handler:
     name: 为 PR 添加标签
@@ -14,4 +17,4 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-ecosystem/action-add-labels@v1
         with:
-          labels: ${{ github.base_ref }}
+          labels: ${{ github.base_ref }}