Update README.md

Author: bluebill1049

README.md

@@ -1,6 +1,7 @@
 <div align="center">
         <a href="https://react-hook-form.com" title="React Hook Form - Simple React forms validation">
             <img src="https://raw.githubusercontent.com/react-hook-form/react-hook-form/master/docs/logo.png" alt="React Hook Form Logo - React hook custom hook for form validation" />
+            <img src="https://user-images.githubusercontent.com/10513364/178235861-ff786497-1b0c-4095-afc5-21c49adae560.png" alt="dev tool screenshot" />
         </a>
 </div>