net/mcast-bridge: Update 1.5.0 => 1.6.0
Changelog:
- Ensure correct interface information for BSD systems.
https://github.com/dennypage/mcast-bridge/releases/tag/v1.6.0
PR: 296844
Sponsored by: UNIS Labs
MFH: 2026Q3
(cherry picked from commit e16d9b7fa1760600aa076c9064b62d2c81d58065)