news/nzbget: Update 25.3 => 25.4

Changelogs:

• https://github.com/nzbgetcom/nzbget/releases/tag/v25.4
• https://github.com/nzbgetcom/nzbget/compare/v25.3...v25.4

• Point WWW to nzbget.com, as nzbget.net is the old, defunct original program, while nzbget.com is the fork that has continued development.

PR: 290465
Approved by: Alex Levy <a13xlevy@pm.me> (maintainer)
Approved by: yuri@ (Mentor)