chore(docs): Updated API Reference (v2) (#9148)

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>

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

@@ -1,7 +1,7 @@
 curl -X POST '{backend_url}/store/customers' \
 -H 'Authorization: Bearer {token}' \
--H 'Content-Type: application/json' \ \
--H 'x-publishable-api-key: {your_publishable_api_key}'
+-H 'Content-Type: application/json' \
+-H 'x-publishable-api-key: {your_publishable_api_key}' \
 --data-raw '{
   "email": "Monserrate.Leannon88@yahoo.com",
   "company_name": "{value}",