chore(docs): Updated API Reference (automated) (#12461)

Automated changes by [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub action

Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>
Co-authored-by: Shahed Nasser <27354907+shahednasser@users.noreply.github.com>

www/apps/api-reference/specs/store/code_samples/Shell/store_returns/post.sh

@@ -1,8 +1,8 @@
-curl -X POST '{backend_url}/store/return' \
--H 'Content-Type: application/json' \
+curl -X POST '{backend_url}/store/returns' \
 -H 'x-publishable-api-key: {your_publishable_api_key}' \
+-H 'Content-Type: application/json' \
 --data-raw '{
-  "order_id": "{value}",
+  "order_id": "order_123",
   "items": [
     {
       "id": "id_XbfptxUVo2io9EI",