Update en.html

Author: Trumeet

support/which-kind-of-key-should-i-input/en.html

@@ -40,6 +40,8 @@ <h2><a name='header-n19' class='md-header-anchor '></a>I've used WeChat or got a
       <p> Note: The key should begain with &#39;R&#39;.</p>
     </blockquote>
     <p>You can just paste your key into the dialog.</p>
+    <h2><a name='header-n8' class='md-header-anchor '></a>I had purchased from shop.yuuta.moe</h2>
+    <p>Please follow <a href='https://shop.yuuta.moe/how-to-activate-original-software/'>https://shop.yuuta.moe/how-to-activate-original-software/</a> to activate.</p>
   </div>
 </body>