remove required property from create sku response type since its an error

Author: zplata

src/api/resources/products/types/ProductsCreateSkuResponse.ts

@@ -5,5 +5,5 @@
 import * as Webflow from "../../../index";
 
 export interface ProductsCreateSkuResponse {
-    skus: Webflow.Sku[];
+    skus?: Webflow.Sku[];
 }

src/serialization/resources/products/types/ProductsCreateSkuResponse.ts

@@ -11,11 +11,11 @@ export const ProductsCreateSkuResponse: core.serialization.ObjectSchema<
     serializers.ProductsCreateSkuResponse.Raw,
     Webflow.ProductsCreateSkuResponse
 > = core.serialization.object({
-    skus: core.serialization.list(Sku),
+    skus: core.serialization.list(Sku).optional(),
 });
 
 export declare namespace ProductsCreateSkuResponse {
     interface Raw {
-        skus: Sku.Raw[];
+        skus?: Sku.Raw[] | null;
     }
 }