Update docs for webhooks

api-playground/openapi/setup.mdx

@@ -96,17 +96,20 @@
 <br />
 
 <Note>
-  The method and path must match the method and path specified in the OpenAPI
-  document exactly. If the endpoint doesn't exist in the OpenAPI file,
-  the page will be empty.
+  In most cases, the method and path must match the method and path specified
+  in the OpenAPI document exactly. If the endpoint doesn't exist in the OpenAPI
+  file, the page will be empty.
+
+  For webhooks, replace the method (i.e. "POST") with "webhook" (case insensitive)
+  and the correct method will be generated.
 </Note>
 
 ### Autogenerate files
 
 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.
 
 ```bash
@@ -128,7 +131,7 @@
 reorder and add the files to your navigation manually.
 
 <Note>
   If your OpenAPI document is invalid, the files will not autogenerate.
 </Note>