lang/scala: Update 3.3.5 => 3.3.7

Change logs:
https://github.com/scala/scala3/releases/tag/3.3.6
https://github.com/scala/scala3/releases/tag/3.3.7

Commit log:
https://github.com/scala/scala3/compare/3.3.5...3.3.7

Somplify installation step.

PR: 293649
Approved by: Jens Grassel <freebsd-ports@jan0sch.de> (maintainer)
Co-authored-by: Vladimir Druzenko <vvd@FreeBSD.org>