Update index.html

Author: vaibhavdaren

index.html

@@ -284,7 +284,7 @@ <h3><a href="#">Join our slack Channel</a></h3>
                                     Don't Wait ,  Connect right now  .
                                     Get united in a common goal  </p>
                         <form>
-				<button type="submit" class="btn btn-danger" onclick="window.location.href='https://goo.gl/3pwWMR'">JOIN US</button>
+				<button type="submit" class="btn btn-danger" onclick="window.location.href='https://codeuino.slack.com/'">JOIN US</button>
                         </form>
                     </div>
                 </div>
@@ -310,7 +310,7 @@ <h3><a href="#">Engagement Team</a></h3>
                         <form>
 
                             <button type="submit" class="btn btn-danger" 
-onclick="window.location.href='https://goo.gl/3pwWMR'">Join Engagement Team</button>
+onclick="window.location.href='https://codeuino.slack.com/'">Join Engagement Team</button>
                         </form>
                     </div>
                 </div>