doc: fix comma splice

PR-URL: #40133
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

doc/api/http.md

@@ -2492,7 +2492,7 @@ added: v0.9.12
 
 * `msesc` {number}
 * `callback` {Function} Optional function to be called when a timeout
-occurs, Same as binding to the `timeout` event.
+  occurs. Same as binding to the `timeout` event.
 * Returns: {this}
 
 Once a socket is associated with the message and is connected,