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] <support@github.com>

Author: dependabot[bot]

.github/workflows/codeql-analysis.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - name: Checkout repository
         id: checkout_repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install .NET 9
         uses: actions/setup-dotnet@v5

.github/workflows/dotnetcore.yml

@@ -10,7 +10,7 @@ jobs:
       VIMEO_TOKEN: ${{ secrets.VIMEO_TOKEN }}
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v5
       with:

.github/workflows/publish.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Setup .NET 9 SDK
       uses: actions/setup-dotnet@v5