doc: change default doc

src/pages/Welcome.tsx

@@ -3,8 +3,8 @@ import React from 'react';
 export default () => (
   <p style={{ textAlign: 'center' }}>
     Want to add more pages? Please refer to{' '}
-    <a href="https://umijs.org/guide/block.html" target="_blank" rel="noopener noreferrer">
-      umi block
+    <a href="https://pro.ant.design/docs/block-cn" target="_blank" rel="noopener noreferrer">
+      use block
     </a>
     。
   </p>