Update actions/checkout action to v6

Author: renovate-bot

.github/workflows/build-game.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - run: echo $env:BUILD_TOOLS_PATH | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           submodules: true
 
@@ -57,7 +57,7 @@ jobs:
       CONAN_SYSREQUIRES_MODE: "enabled"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           submodules: true
 

.github/workflows/check-json.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Check if images exist
         run: node ./tools/CI/check-jsons.js

.github/workflows/sonarcloud.yml

@@ -13,7 +13,7 @@ jobs:
     env:
       CONAN_SYSREQUIRES_MODE: "enabled"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0