mail/roundcube-carddav: update to 4.3.0

Release notes:
https://github.com/mstilkerich/rcmcarddav/releases/tag/v4.1.0
https://github.com/mstilkerich/rcmcarddav/releases/tag/v4.1.1
https://github.com/mstilkerich/rcmcarddav/releases/tag/v4.1.2
https://github.com/mstilkerich/rcmcarddav/releases/tag/v4.2.0
https://github.com/mstilkerich/rcmcarddav/releases/tag/v4.2.1
https://github.com/mstilkerich/rcmcarddav/releases/tag/v4.2.2
https://github.com/mstilkerich/rcmcarddav/releases/tag/v4.3.0

PR: 262444
Reported by: Florian Wagner <florian@wagner-flo.net>