sysutils/graylog: Update 7.1.5 => 7.1.6
Changelog:
https://go2docs.graylog.org/current/changelogs/changelog.html#Graylog716
Reported by: portscout
Sponsored by: UNIS Labs
MFH: 2026Q3
(cherry picked from commit eac661a0e3de3dbf3e601dc4fb1c1967a005d1f3)