Update version in index.html

Author: WorkofAditya

index.html

@@ -89,7 +89,7 @@ <h2 class="about-title">ChatBot</h2>
   <a href="https://codepen.io/WorkofAditya/pen/azNBRWr" target="_blank">CodePen</a>
 </div>
     <p class="about-dev">Developed by <b>Adityasinh Sodha</b></p>
-        <p class="about-version">Version: <b>v1.5</b></p>
+        <p class="about-version">Version: <b>v2.0.0</b></p>
   </div>
 </div>