Docs: async assertions 2

Author: egil

docs/samples/tests/xunit/AsyncDataTest.cs

@@ -63,7 +63,7 @@ public void LoadDataAsyncAssertion()
 
       // Wait for assertion to pass
       cut.WaitForAssertion(() => cut.MarkupMatches("<p>Hello World</p>"));
-      cut.WaitForAssertion(() => cut.MarkupMatches("<p>xHello World</p>"), TimeSpan.FromSeconds(2));
+      cut.WaitForAssertion(() => cut.MarkupMatches("<p>Hello World</p>"), TimeSpan.FromSeconds(2));
     }
   }
 }