Update index.html

Author: vardhansanagapalli

index.html

@@ -139,7 +139,7 @@
                         <a href="https://github.com/github-community-gitam" class="mx-2">
                             <img src="./assets/Github.svg" height="60">
                         </a>
-                        <a href="https://www.instagram.com/github.gitam" class="mx-2">
+                        <a href="https://www.instagram.com/githubcommunitygitam" class="mx-2">
                             <img src="./assets/Instagram.svg" height="60">
                         </a>
                         <a href="https://www.linkedin.com/company/github-gitam" class="mx-2">
@@ -161,4 +161,4 @@
     <script src="src/script.js"></script>
 </body>
 
-</html>
+</html>