[AC] Update app logo to differentiate from MobileBuyIntegration (#381)

feat: add new app icon

Author: kieran-osgood-shopify

Samples/ShopifyAcceleratedCheckoutsApp/ShopifyAcceleratedCheckoutsApp/Assets.xcassets/AppIcon.appiconset/1024 1.jpg

@@ -1,7 +1,7 @@
 {
   "images" : [
     {
-      "filename" : "1024.jpg",
+      "filename" : "app-logo.png",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"
@@ -13,7 +13,6 @@
           "value" : "dark"
         }
       ],
-      "filename" : "1024 1.jpg",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"
@@ -25,7 +24,6 @@
           "value" : "tinted"
         }
       ],
-      "filename" : "1024 2.jpg",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"