doc: Update dump({ limit: Integer }) default value (#4981)

Author: samuel871211

docs/docs/api/Dispatcher.md

@@ -533,7 +533,7 @@ The `RequestOptions.method` property should not be value `'CONNECT'`.
 
 `body` contains the following additional extensions:
 
-- `dump({ limit: Integer })`, dump the response by reading up to `limit` bytes without killing the socket (optional) - Default: 262144.
+- `dump({ limit: Integer })`, dump the response by reading up to `limit` bytes without killing the socket (optional) - Default: 131072.
 
 Note that body will still be a `Readable` even if it is empty, but attempting to deserialize it with `json()` will result in an exception. Recommended way to ensure there is a body to deserialize is to check if status code is not 204, and `content-type` header starts with `application/json`.