website: update example.

README.md

@@ -14,7 +14,7 @@ CodeMirror component for React. Demo Preview: [@uiwjs.github.io/react-codemirror
 **Features:**
 
 🚀 Quickly and easily configure the API.  
-🌱 Use [codemirror 6](https://github.com/uiwjs/react-codemirror/issues/88).  
+🌱 Use [codemirror 6](https://codemirror.net/6/). [#88](https://github.com/uiwjs/react-codemirror/issues/88).  
 ⚛️ Support the features of React Hook(requires React 16.8+).  
 📚 Use Typescript to write, better code hints.  
 🌎 There are better [sample previews](https://uiwjs.github.io/react-codemirror).

website/App.module.less

@@ -120,6 +120,9 @@ body {
 .footer {
   text-align: center;
   padding-top: 30px;
+  a {
+    text-decoration: none;
+  }
 }
 
 .codemirror {

website/App.tsx

@@ -25,10 +25,6 @@ import { Select } from './Select';
 const langs: Record<string, any> = { javascript, html, css, json, python, markdown, xml, sql, java, rust, cpp, lezer, php };
 
 const hyperlink: { href: string; label: string; style?: React.CSSProperties; }[] = [
-  {
-    href: 'https://github.com/uiwjs/react-codemirror',
-    label: 'View on GitHub',
-  },
   {
     href: 'https://www.npmjs.com/package/@uiw/react-codemirror',
     label: 'View on NPM',
@@ -51,6 +47,9 @@ const hyperlink: { href: string; label: string; style?: React.CSSProperties; }[]
 const themeOptions = [ 'dark', 'light' ];
 const heightOptions = [ 'auto', '200px', '300px', '500px' ];
 
+
+let count = 0
+
 export default function App() {
   const [mode, setMode] = useState('javascript');
   const [theme, setTheme] = useState<ReactCodeMirrorProps['theme']>('light');
@@ -120,7 +119,9 @@ export default function App() {
         <Select label="Lang" options={Object.keys(langs)} value={mode} onChange={(evn) => handleLangChange(evn.target.value)} />
         <Select label="Theme" options={themeOptions} value={theme} onChange={(evn) => setTheme(evn.target.value as ReactCodeMirrorProps['theme'])} />
         <Select label="Height" options={heightOptions} value={height} onChange={(evn) => setHeight(evn.target.value)} />
-        <button onClick={() => setCode('console.log("Hello World!")')}>
+        <button onClick={() => {
+          count++; setCode(`console.log("Hello World! ${count}")`);
+        }}>
           change code
         </button>
       </div>