readme update

Author: adamberecz

README.md

@@ -1,5 +1,7 @@
 <div align="center">
-  <img align="center" src="https://github.com/vueform/toggle/raw/main/assets/vueform-gh.png">
+  <a href="https://vueform.com?ref=ghb">
+    <img align="center" src="https://github.com/vueform/toggle/raw/main/assets/vueform-gh.png" alt="Vueform" title="Vueform">
+  </a>
 
   <br>
   <br>
@@ -345,7 +347,6 @@ Vueform pre-release is open for registration for the first 100 developers.
 
 Learn more: [https://vueform.com](https://vueform.com)
 
-
 ## License
 
 [MIT](https://github.com/vueform/toggle/blob/main/LICENSE.md)