improve docs

Author: broccolinisoup

docs/content/drafts/UnderlineNav2.mdx

@@ -103,22 +103,15 @@ render(<Navigation />)
 ### With React Router
 
 ```jsx
-import {Link, useNavigate} from 'react-router-dom'
+import {Link} from 'react-router-dom'
 import {UnderlineNav} from '@primer/react/drafts'
 const Navigation = () => {
-  const navigate = useNavigate()
   return (
     <UnderlineNav aria-label="Repository">
       <UnderlineNav.Item as={Link} to="code" counter={4} selected>
         Code
       </UnderlineNav.Item>
-      <UnderlineNav.Item
-        counter={44}
-        as={Link}
-        onSelect={() => {
-          navigate('issues')
-        }}
-      >
+      <UnderlineNav.Item counter={44} as={Link} to="issues">
         Issues
       </UnderlineNav.Item>
       <UnderlineNav.Item as={Link} to="pulls">
@@ -129,11 +122,6 @@ const Navigation = () => {
 }
 ```
 
-<Note>
-  You can bind the routing with both 'to' and 'onSelect' prop here. However; please note that if an 'href' prop is
-  passed, it will be ignored here.
-</Note>
-
 ## Props
 
 ### UnderlineNav