docs: add-missing-space-in-unmount-component-at-node (#5875)

Author: tooooo1

src/content/reference/react-dom/unmountComponentAtNode.md

@@ -56,7 +56,7 @@ unmountComponentAtNode(domNode);
 Call `unmountComponentAtNode` to remove a <CodeStep step={1}>mounted React component</CodeStep> from a <CodeStep step={2}>browser DOM node</CodeStep> and clean up its event handlers and state.
 
 ```js [[1, 5, "<App />"], [2, 5, "rootNode"], [2, 8, "rootNode"]]
-import {render, unmountComponentAtNode} from 'react-dom';
+import { render, unmountComponentAtNode } from 'react-dom';
 import App from './App.js';
 
 const rootNode = document.getElementById('root');
@@ -90,7 +90,7 @@ In this example, clicking "Render React App" will render a React app. Click "Unm
 
 ```js index.js active
 import './styles.css';
-import {render, unmountComponentAtNode} from 'react-dom';
+import { render, unmountComponentAtNode } from 'react-dom';
 import App from './App.js';
 
 const domNode = document.getElementById('root');