chore(workflow): 更新 GitHub Actions 工作流配置

- 移除 auto-tag 工作流中的 ref 参数配置
- 清理工作流中多余的检查跳过关键词步骤
- 为 ci 工作流添加内容读取权限配置
- 优化工作流触发条件和权限设置

.github/workflows/auto-tag.yml

@@ -26,7 +26,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-          ref: ${{ github.event.workflow_run.head_sha }}
           persist-credentials: false
       
       - name: Check for skip keyword

.github/workflows/ci.yml

@@ -8,6 +8,9 @@ on:
   pull_request:
     branches: [ main, master ]
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: Build and Test