sysutils/k9s: Update 0.50.7 => 0.50.9

Changelogs:
https://github.com/derailed/k9s/releases/tag/v0.50.8
https://github.com/derailed/k9s/releases/tag/v0.50.9

While here remove go version - 1.24 is default in ports.

PR: 288258
Approved by: Robert Gogolok <gogolok@gmail.com> (maintainer)