Add commented out CSS code for "material-symbols-outlined" spinner

apps/app/src/components/LoadingSpinner.module.scss

@@ -1,3 +1,14 @@
+// .spinner {
+//   animation: animation-rotate 750ms infinite linear;
+// }
+
+// @keyframes animation-rotate {
+//   100% {
+//     transform: rotate(360deg);
+//     transform: rotate(360deg);
+//   }
+// }
+
 /** refs: https://loading.io/css/ */
 .lds-dual-ring {
   display: inline-block;