dns/unbound: Update to 1.19.1
Release notes at
https://www.nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/
Security: CVE-2023-50387, CVE-2023-50868
Approved by: Jaap Akkerhuis <jaap@NLnetLabs.nl>
(cherry picked from commit efa763f5ae59537388818334ecf1aa0954a67459)