dns/{knot3,py-libknot}: Update 3.4.5 => 3.4.6
Important bugfixes:
knotd: TLS handshake fails on FreeBSD
knotd: outbound QUIC communication fails on FreeBSD
Changelog:
https://www.knot-dns.cz/2025-04-10-version-346.html
PR: 286151
MFH: 2025Q2
(cherry picked from commit 904d9a369b881d1563076c4f4c2f87e37d224d7f)