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](actions/checkout@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] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
         dotnet-version: ["8.0.x",]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup .NET Core SDK ${{ matrix.dotnet-version }}
         uses: actions/setup-dotnet@v4

.github/workflows/publish.yml

@@ -12,7 +12,7 @@ jobs:
         dotnet-version: ["8.0.x"]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup .NET Core SDK ${{ matrix.dotnet-version }}
         uses: actions/setup-dotnet@v4

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
         dotnet-version: ["8.0.x"]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup .NET Core SDK ${{ matrix.dotnet-version }}
         uses: actions/setup-dotnet@v4