refactor: use createRoot

src/index.js

@@ -1,11 +1,12 @@
-import React from 'react';
-import ReactDOM from 'react-dom';
-import './index.css';
-import App from './App';
-import * as serviceWorker from './serviceWorker';
-import 'semantic-ui-css/semantic.min.css';
+import React from "react";
+import "./index.css";
+import App from "./App";
+import * as serviceWorker from "./serviceWorker";
+import "semantic-ui-css/semantic.min.css";
+import { createRoot } from "react-dom/client";
 
-ReactDOM.render(<App />, document.getElementById('root'));
+const root = createRoot(document.getElementById("root"));
+root.render(<App />);
 
 // If you want your app to work offline and load faster, you can change
 // unregister() to register() below. Note this comes with some pitfalls.