doc: add version for http.createServer() options addition

8.12 Changelog
https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V8.md#8.12.0

Specifically
[01dc646] - http: add options to http.createServer() #15752

PR-URL: #25001
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>

Author: benswinburne

doc/api/http.md

@@ -1816,7 +1816,7 @@ Found'`.
 <!-- YAML
 added: v0.1.13
 changes:
-  - version: v9.6.0
+  - version: v9.6.0, v8.12.0
     pr-url: https://github.com/nodejs/node/pull/15752
     description: The `options` argument is supported now.
 -->