doc: alphabetize http response properties

All the properties are already in alphabetical order except for
createPushResponse(). Move that property to the alphabetical location in
the list.

PR-URL: https://github.com/nodejs/node/pull/36631


Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>