fix: update logo (#921)

Updates logo to cleaner version

Author: achingbrain

img/logo.pxd

@@ -40,7 +40,7 @@
 
       .loading-animation {
         position: fixed;
-        background-image: url('/ipfs-sw-cube.svg');
+        background-image: url('/ipfs-sw-icon-512.png');
         width: 10rem;
         height: 10rem;
         -webkit-animation: heartbeat 1.5s ease-in-out 0s infinite normal both;