Update actions tags

Author: DavidZidar

.github/workflows/build.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v5