Upgrade checkout action from v4 to v5

Author: BenjaminMichaelis

.github/workflows/build-and-test.yml

@@ -19,7 +19,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: Setup .NET and Build
       uses: ./.github/actions/setup-dotnet-build
     - name: Test