dns/{knot3,py-libknot}: Update 3.5.0 => 3.5.2
Changelog:
https://gitlab.nic.cz/knot/knot-dns/raw/v3.5.2/NEWS
PR: 291264 289611
Approved by: Leo Vandewoestijne <freebsd@dns.company> (maintainer)
MFH: 2025Q4
(cherry picked from commit be60b49d5a9bcfd93dcc3a39a3d68f0aef7a9a06)