xplat/js: Auto-fix react-prefer-namespace-import ESLint Rule

Summary:
X-link: facebook/react-native#56233

Applies the automatic fixes from the new `react-prefer-namespace-import` ESLint rule.

Changelog:
[Internal]

Reviewed By: thegreatercurve

Differential Revision: D98338132

fbshipit-source-id: 856dd5b96bfb7ab8398bdcbea3651435acbc891e

Author: yungsters

website/src/pages/help/index.js

@@ -9,7 +9,7 @@
  */
 
 import Layout from '@theme/Layout';
-import React from 'react';
+import * as React from 'react';
 
 const supportLinks = [
   {

website/src/pages/index.js

@@ -16,7 +16,7 @@ import useBaseUrl from '@docusaurus/useBaseUrl';
 import useDocusaurusContext from '@docusaurus/useDocusaurusContext';
 import Layout from '@theme/Layout';
 import classnames from 'classnames';
-import React from 'react';
+import * as React from 'react';
 import GitHubButton from 'react-github-btn';
 
 const contents = [