news/nzbhydra2: update to v4.7.4

Summary:

• Add environment variable to suppress update dialog
• Update JDK to v17 to satisfy future requirement
• Maintainer change
• Remove build leftover

Changes: https://github.com/theotherp/nzbhydra2/blob/v4.7.4/changelog.md

PR: 268430
Approved by: pkubaj (mentor)
Differential Revision: https://reviews.freebsd.org/D37782