doc: update http.setMaxIdleHTTPParsers arguments

Fixes: #46160
PR-URL: #46168
Reviewed-By: Paolo Insogna <paolo@cowtech.it>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

doc/api/http.md

@@ -3731,17 +3731,17 @@ try {
 }
 ```
 
-## `http.setMaxIdleHTTPParsers`
+## `http.setMaxIdleHTTPParsers(max)`
 
 <!-- YAML
 added:
   - v18.8.0
   - v16.18.0
 -->
 
-* {number}
+* `max` {number} **Default:** `1000`.
 
-Set the maximum number of idle HTTP parsers. **Default:** `1000`.
+Set the maximum number of idle HTTP parsers.
 
 [RFC 8187]: https://www.rfc-editor.org/rfc/rfc8187.txt
 [`'ERR_HTTP_CONTENT_LENGTH_MISMATCH'`]: errors.md#err_http_content_length_mismatch