Update oauth2.md

docs/sso/oauth2.md

@@ -87,7 +87,7 @@ https://sso.maxkey.org/maxkey/oauth/v20/token?client_id=YOUR_CLIENT_ID&client_se
   </tr>
  </table>
  	 
-请求参数
+<h5>请求参数</h5>
 
  <table border="0" class="table table-striped table-bordered ">
    <tr>