Fix: Accidentally used menu category instead of sale category

bookie/src/app/beer-sale-report/beer-sale-report.ts

@@ -1,10 +1,10 @@
-import { MenuCategory } from '../core/menu-category';
+import { SaleCategory } from '../core/sale-category';
 import { BeerSaleReportItem } from './beer-sale-report-item';
 
 export class BeerSaleReport {
   startDate: string;
   finishDate: string;
-  menuCategory: MenuCategory;
+  saleCategory: SaleCategory;
   regular: boolean;
   happy: boolean;
   staff: boolean;
@@ -15,7 +15,7 @@ export class BeerSaleReport {
   public constructor(init?: Partial<BeerSaleReport>) {
     this.startDate = '';
     this.finishDate = '';
-    this.menuCategory = new MenuCategory();
+    this.saleCategory = new SaleCategory();
     this.regular = true;
     this.happy = true;
     this.staff = true;