docs: fix create category curl example (#3962)

* Fix create category curl example

Fix trailing comma on category create example

* Update create-product-category.ts

Fix trailing comma example

* Update manage-categories.mdx

remove trailing comma

* Revert

* Update manage-categories.mdx

Fix curl example

packages/medusa/src/api/routes/admin/product-categories/create-product-category.ts

@@ -43,7 +43,7 @@ import { FindParams } from "../../../../types/common"
  *       --header 'Authorization: Bearer {api_token}' \
  *       --header 'Content-Type: application/json' \
  *       --data-raw '{
- *           "name": "Skinny Jeans",
+ *           "name": "Skinny Jeans"
  *       }'
  * security:
  *   - api_token: []