docs: skip Respone.json and Request.postDataJSON in Java (#5292)

docs/src/api/class-request.md

@@ -64,6 +64,7 @@ Request's post body, if any.
 Request's post body in a binary form, if any.
 
 ## method: Request.postDataJSON
+* langs: js, python
 - returns: <[null]|[any]>
 
 Returns parsed request's body for `form-urlencoded` and JSON as a fallback if any.

docs/src/api/class-response.md

@@ -23,6 +23,7 @@ Returns the [Frame] that initiated this response.
 Returns the object with HTTP headers associated with the response. All header names are lower-case.
 
 ## async method: Response.json
+* langs: csharp, js, python
 - returns: <[Serializable]>
 
 Returns the JSON representation of response body.