update assets part 1

assets/fontawesomefree/js-packages/@fortawesome/fontawesome-free/scss/_mixins.scss

@@ -41,6 +41,8 @@
   }
 }
 
+// sets a specific icon family to use alongside style + icon mixins
+
 // convenience mixins for declaring pseudo-elements by CSS variable,
 // including all style-specific font properties, and both the ::before
 // and ::after elements in the duotone case.