docs: fix schema of product category (#12145)

www/apps/api-reference/specs/admin/components/schemas/StoreProductCategory.yaml

@@ -14,11 +14,6 @@ required:
   - updated_at
   - deleted_at
 properties:
-  products:
-    type: array
-    description: The category's products.
-    items:
-      $ref: ./StoreProduct.yaml
   id:
     type: string
     title: id
@@ -68,3 +63,8 @@ properties:
     format: date-time
     title: deleted_at
     description: The date the category was deleted.
+  products:
+    type: array
+    description: The category's products.
+    items:
+      $ref: ./StoreProduct.yaml