Bump actions/checkout from 5.0.1 to 6.0.0 (2dust#8359)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.1 to 6.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5.0.1...v6.0.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-linux.yml

@@ -31,7 +31,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5.0.1
+      uses: actions/checkout@v6.0.0
       with:
         submodules: 'recursive'
         fetch-depth: '0'
@@ -110,7 +110,7 @@ jobs:
         dnf -y install sudo git rpm-build rpmdevtools dnf-plugins-core rsync findutils tar gzip unzip which
 
     - name: Checkout repo (for scripts)
-      uses: actions/checkout@v5.0.1
+      uses: actions/checkout@v6.0.0
       with:
         submodules: 'recursive'
         fetch-depth: '0'

.github/workflows/build-osx.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5.0.1
+      uses: actions/checkout@v6.0.0
       with:
         submodules: 'recursive'
         fetch-depth: '0'

.github/workflows/build-windows-desktop.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5.0.1
+      uses: actions/checkout@v6.0.0
       with:
         submodules: 'recursive'
         fetch-depth: '0'

.github/workflows/build-windows.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5.0.1
+      uses: actions/checkout@v6.0.0
 
     - name: Setup
       uses: actions/setup-dotnet@v5.0.0