fix(js-sdk): fix the API route used in fulfillment.cancel method (#11936)

.changeset/old-comics-juggle.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/js-sdk": patch
+---
+
+fix(js-sdk): fix the API route used in fulfillment.cancel method

packages/core/js-sdk/src/admin/fulfillment.ts

@@ -85,7 +85,7 @@ export class Fulfillment {
     headers?: ClientHeaders
   ) {
     return await this.client.fetch<HttpTypes.AdminFulfillmentResponse>(
-      `/admin/fulfillments/${id}`,
+      `/admin/fulfillments/${id}/cancel`,
       {
         method: "POST",
         body: {},