Bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/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](actions/checkout@v6...v7)

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

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

Author: dependabot[bot]

.github/workflows/codeql.yml

@@ -56,7 +56,7 @@ jobs:
         # your codebase is analyzed, see https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/markdownlint.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - name: Use Node.js
       uses: actions/setup-node@v6
       with:

.github/workflows/pull_request.yml

@@ -18,7 +18,7 @@ jobs:
         dotnet-version: [ '10.0' ]
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - name: Setup .NET Core SDK ${{ matrix.dotnet-version }}
       uses: actions/setup-dotnet@v5
       with:

.github/workflows/push.yml

@@ -16,7 +16,7 @@ jobs:
         dotnet-version: [ '10.0' ]
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - name: Setup .NET Core SDK ${{ matrix.dotnet-version }}
       uses: actions/setup-dotnet@v5
       with: