fix: medusa-service generated update functions always returns an array even if single object is passed.

.changeset/young-fishes-grab.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/utils": patch
+---
+
+fix: medusa-service generated functions always return array of data even when only single object is passed

packages/core/utils/src/modules-sdk/medusa-service.ts

@@ -243,7 +243,7 @@ export function MedusaService<
           data = [],
           sharedContext: Context = {}
         ): Promise<T | T[]> {
-          const serviceData = Array.isArray(data) ? data : [data]
+          const serviceData = data
           const service = this.__container__[serviceRegistrationName]
           const response = await service.update(serviceData, sharedContext)