fix(core): Use correct Money type on ProductVariantPrice.price field

packages/core/src/api/schema/admin-api/product-admin.type.graphql

@@ -5,7 +5,7 @@ type Product implements Node {
 
 type ProductVariantPrice {
     currencyCode: CurrencyCode!
-    price: Int!
+    price: Money!
 }
 
 type ProductVariant implements Node {