Fix About Page Responsiveness (#736)

* Fix committee links

* Fix ACM Design instagram link

* Fix TeachLA facebook link

* Add discord link for ACM Design

* Fix instagram for AI

* Fix discord link for Cloud

* Add facebok link for Cyber

* Fix media max-width to match navbar-breakpoint

* Double quotes to single quote

styles/pages/About.module.scss

@@ -98,10 +98,10 @@
 
 .social-media {
   display: flex;
-  justify-content: center; 
+  justify-content: center;
 }
 
-@media (max-width: 600px) {
+@media (max-width: $navbar-breakpoint) {
   .square-ornament {
     display: block;