Update OpenAPI content styling - Fluid Topics - Latest

Users with the ADMIN or PORTAL_ADMIN role can update the OpenAPI styling manually.

1. Open the Custom CSS classes tab of the Content styles menu.
2. To exclusively target OpenAPI content, create a custom CSS class named openapi bound to the ft:sourceType metadata key with the value Openapi.
3. Open the Attachments sidebar, and open the openapi.less file.
4. Copy the entire content of the openapi.less file.
5. Paste it in the Topic Styles tab.
6. Save.