www/waterfox: update to G6.0.17

There have been many releases since then:
https://github.com/BrowserWorks/Waterfox/releases
Changelogs: https://www.waterfox.net/docs/releases/G6.0.17/

This release is based on Firefox ESR 115.

New maintainer: Martin Filla <freebsd@sysctl.cz>

PR: 278672