Bump actions/checkout from 5 to 6 (#259)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         submodules: recursive
 
@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         submodules: recursive
 
@@ -61,7 +61,7 @@ jobs:
     runs-on: [self-hosted, windows]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         submodules: recursive
 
@@ -81,7 +81,7 @@ jobs:
     runs-on: [self-hosted, linux]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         submodules: recursive
 

.github/workflows/clang-format-check.yml

@@ -9,7 +9,7 @@ jobs:
         path:
           - 'Fronter/Source'
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Run clang-format style check for C/C++ programs.
       uses: jidicula/clang-format-action@v4.16.0
       with: