Bump actions/checkout from 5 to 6

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] <[email protected]>

Author: dependabot[bot]

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

@@ -11,7 +11,7 @@ jobs:
             exclude: '(external)'
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Run clang-format style check for C/C++ programs.
       uses: jidicula/[email protected]
       with:

.github/workflows/linux_codeql-analysis.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
         submodules: recursive
@@ -55,7 +55,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
         submodules: recursive

.github/workflows/linux_coverage.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
         submodules: recursive
@@ -65,7 +65,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
         submodules: recursive

.github/workflows/publish_commit_id.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Publish commit id
       uses: ParadoxGameConverters/publish_commit_id@main

.github/workflows/windows_build_and_test.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: [self-hosted, windows]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
         submodules: recursive
@@ -38,7 +38,7 @@ jobs:
     runs-on: windows-2022
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
         submodules: recursive

.github/workflows/windows_cmake_build.yml

@@ -23,7 +23,7 @@ jobs:
       run: echo "c:\program files\ninja" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
 
     - name: "Cloning repo"
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
         submodules: recursive
@@ -52,7 +52,7 @@ jobs:
 
     steps:
     - name: "Cloning repo"
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
         submodules: recursive