Update collab images

Author: sudheerj

README.md

@@ -7,12 +7,12 @@
 <div>
 <p align="center">
   <a href="https://www.greatfrontend.com/questions/js?utm_source=github&utm_medium=referral&utm_campaign=sudheerj-react&fpr=sudheerj">
-    <img src="./images/collab/greatfrontend-js-banner4x.png" alt="GreatFrontEnd JavaScript Interview Questions" width="100%">
+    <img src="./images/collab/greatfrontend-js.gif" alt="GreatFrontEnd JavaScript Interview Questions" width="100%">
   </a>
 </p>
 </div>
 
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