give a dot point

Author: bluebill1049

README.md

@@ -28,7 +28,7 @@ $ npm install @hookform/error-message
 
 ## Quickstart
 
-Single Error Message
+- Single Error Message
 
 ```jsx
 import React from 'react';
@@ -64,7 +64,7 @@ export default function App() {
 
 ---
 
-Multiple Error Messages
+- Multiple Error Messages
 
 ```jsx
 import React from 'react';