build(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [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/v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/license-compliance.yml

@@ -1,4 +1,4 @@
-name: License Compliance (Feluda)
+name: License Compliance (Feluda)
 
 on:
   push:
@@ -21,7 +21,7 @@ jobs:
       contains(github.event.workflow_run.head_commit.message, '[release ci]')
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # 使用Feluda许可证扫描器检查项目依赖的许可证合规性
       # 配置参数：

.github/workflows/publish-docs.yml

@@ -1,4 +1,4 @@
-# 工作流名称：Publish Docs
+# 工作流名称：Publish Docs
 # 该工作流用于在推送到 main 分支时自动构建并发布文档到 GitHub Pages。
 # 暂时关了，目前这个文档生成有问题，以后再改
 
@@ -55,7 +55,7 @@ jobs:
     steps:
       # 步骤 1：检出代码仓库。
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # 步骤 2：安装 .NET SDK。
       - name: Setup .NET