add section to autogeneration docs

Author: lawreka

api-playground/openapi/setup.mdx

@@ -109,8 +109,12 @@ only one OpenAPI file - it will automatically detect your OpenAPI file.
 For large OpenAPI documents, creating one MDX page for each OpenAPI operation can be a lot of work. To make it easier, we created a local OpenAPI page scraper.
 
 Our Mintlify [scraper](https://www.npmjs.com/package/@mintlify/scraping)
-autogenerates MDX files for your OpenAPI endpoints. Use the relative path to the
-OpenAPI document in your codebase.
+autogenerates MDX files for your OpenAPI endpoints.
+
+Each generated page will correspond to an OpenAPI operation under the "paths" section of the OpenAPI schema.
+If your OpenAPI document is version 3.1+, the scraper will also generate pages for webhooks under the "webhooks" section of the OpenAPI schema.
+
+Use the relative path to the OpenAPI document in your codebase.
 
 ```bash
 npx @mintlify/scraping@latest openapi-file <path-to-openapi-file>