fix example correctness (#90)

motivation: make example more correct

changes: update response in DispatchQueue.main

Author: tomerd

Examples/LocalDebugging/MyApp/MyApp/ContentView.swift

@@ -65,13 +65,19 @@ struct ContentView: View {
                     throw CommunicationError(reason: "invald response, empty body")
                 }
                 let response = try JSONDecoder().decode(Response.self, from: data)
-                self.response = response.message
+                self.setResponse(response.message)
             } catch {
-                self.response = "\(error)"
+                self.setResponse("\(error)")
             }
         }
         task.resume()
     }
+
+    func setResponse(_ text: String) {
+        DispatchQueue.main.async {
+            self.response = text
+        }
+    }
 }
 
 struct ContentView_Previews: PreviewProvider {