5.0: Update REST API Ref links

[adriendupuis]

Question	Answer
JIRA Ticket
Versions	5.0
Edition

Updates easiest anchor links to the new 5.0 REST API Reference.

To find remaining links to update:

find docs/ -type f -a -name '*.md' | sort | xargs grep 'rest_api_reference.html#' -n | grep -v 'rest_api_reference.html#tag' | grep -v '/en/4'

Remainings:

• Undocumented ressources
  • Discounts, AI Actions controllers are not documented w/ API Platform / OpenAPI and doesn't appear in the output
  • The replacement of 4.6- custom verbs by new Content-Type headers and payloads isn't well documented yet
• "New in the doc": I will treat this in another PR, it will probably be about changing all links from /en/latest/ to /en/4.6/

Checklist

• Text renders correctly
• Text has been checked with vale
• Description metadata is up to date
• Redirects cover removed/moved pages
• Code samples are working
• PHP code samples have been fixed with PHP CS fixer
• Added link to this PR in relevant JIRA ticket or code PR

[github-actions]

Preview of modified files

Preview of modified Markdown:

• docs/administration/recent_activity/recent_activity.md
• docs/api/rest_api/rest_api_usage/rest_requests.md
• docs/api/rest_api/rest_api_usage/rest_responses.md
• docs/commerce/cart/cart.md
• docs/commerce/cart/cart_api.md
• docs/commerce/order_management/order_management.md
• docs/commerce/order_management/order_management_api.md
• docs/commerce/payment/payment.md
• docs/commerce/payment/payment_method_api.md
• docs/content_management/content_api/browsing_content.md
• docs/content_management/content_api/creating_content.md
• docs/content_management/content_api/managing_content.md
• docs/content_management/content_management_api/bookmark_api.md
• docs/content_management/content_management_api/object_state_api.md
• docs/content_management/content_management_api/section_api.md
• docs/customer_management/customer_portal_guide.md
• docs/pim/product_api.md
• docs/release_notes/ibexa_dxp_v4.6.md