Merge pull request #9 from ssciwr/dependabot/github_actions/actions/checkout-6

Bump actions/checkout from 5 to 6

Author: thomasisensee

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: make build directory
       run: cmake -E make_directory ${{runner.workspace}}/build