refactor: replace iOS app icon with new logo image

iosApp/iosApp/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,7 +1,7 @@
 {
   "images" : [
     {
-      "filename" : "app-icon-1024.png",
+      "filename" : "logo_ios.jpg",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"
@@ -33,4 +33,4 @@
     "author" : "xcode",
     "version" : 1
   }
-}
+}