Updates sample application

Author: ThuF

README.md

@@ -51,7 +51,7 @@ The [demo-application](demo-application) folder contains a simple applications,
 **demo-application/demo.ts**
 ```ts
 import { response } from "sdk/http";
-import { MyApi } from "/custom-api/MyApi";
+import { MyApi } from "../custom-api/MyApi";
 
 const myApiInstance = new MyApi();
 

demo-application/demo.ts

@@ -1,5 +1,5 @@
 import { response } from "sdk/http";
-import { MyApi } from "/custom-api/MyApi";
+import { MyApi } from "../custom-api/MyApi";
 
 const myApiInstance = new MyApi();