Fix the double-task typo in docs

Co-authored-by: Patryk Pochmara <[email protected]>

docs/tests/integration_tests/index.md

@@ -232,7 +232,7 @@ public class UnauthenticatedExampleAppTestApp : ExampleAppTestApp
     public HttpCommandsExecutor Command { get; private set; } = default!;
     public HttpOperationsExecutor Operation { get; private set; } = default!;
 
-    public override async ValueTaskTask InitializeAsync()
+    public override async ValueTask InitializeAsync()
     {
         await base.InitializeAsync();