fix: Change Download Invoice Icon (#5649)

Author: DIVYAM TAYAL

app/templates/orders/view.hbs

@@ -38,7 +38,7 @@
         </button>
         <button {{action 'downloadInvoice' this.model.event.name this.model.order.identifier }}
           class="ui labeled icon blue {{if this.isLoadingInvoice 'loading'}} {{if this.device.isMobile 'fluid'}} button">
-          <i class="download icon"></i>
+          <i class="file alternate icon"></i>
           {{t 'Download Invoice'}}
         </button>
       </div>