yes it does work

src/App.tsx

@@ -22,7 +22,7 @@ function App() {
           count is {count}
         </button>
         <p>
-          Add <code>app_build_command</code> and <code>app_file</code> in your README's metadata to easily build and deploy your app :)
+          Add <code>app_build_command</code> and <code>app_file</code> in your README's metadata to easily build and deploy your app ;) 
         </p>
       </div>
       <p className="read-the-docs">