Merge pull request #37 from maxkratz/feature/update-checkout-github-action-v6

Updates all checkout GitHub Actions to v6

Author: maxkratz

.github/workflows/build-ci.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       # Set up
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up JDK 17
         uses: actions/setup-java@v5
         with:
@@ -52,7 +52,7 @@ jobs:
 
     steps:
       # Set up
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx