readme update

Author: MatthieuJnon

README.md

@@ -15,12 +15,12 @@ A simple webchat widget to connect with a chatbot. Forked from [react-chat-widge
 
 ## Setup
 
-### In a `<script> tag
+### In a `<script>` tag
 
 In your `<body/>`:
 ```javascript
 <div id="webchat"/>
-<script src="https://storage.googleapis.com/mrbot-cdn/webchat-0.5.3.js"></script>
+<script src="https://storage.googleapis.com/mrbot-cdn/webchat-0.5.5.js"></script>
 <script>
   WebChat.default.init({
     selector: "#webchat",