actions(deps): bump actions/checkout in the github-actions group

Bumps the github-actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 6 to 7
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/publish-extension.yml

@@ -21,7 +21,7 @@ jobs:
     steps:
       # 第一步：检出源代码
       - name: 检出代码
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       # 第二步：设置 Python 环境用于构建脚本
       - name: 设置 Python

.github/workflows/test-build.yml

@@ -33,7 +33,7 @@ jobs:
 
     steps:
       - name: 检出代码
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: 设置 Python
         uses: actions/setup-python@v6