zfs completions are outdated

Completions for some zfs commands are outdated, especially related to dataset encryption.

E.g. "keysource" was replaced by "keylocation".

It seems the changed were just very recently implemented upstream:

https://github.com/zsh-users/zsh/commit/85bf9740a01e168b7b814469892d97fdabc67144#diff-8e2d9dc05a02e9bc9ff23b6c31121f1c62854d052c11abe50837357b3a6fdb06

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: zsh 5.8-3ubuntu1
ProcVersionSignature: Ubuntu 5.13.0-22.22~20.04.1-generic 5.13.19
Uname: Linux 5.13.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Jan 5 10:46:46 2022
SourcePackage: zsh
UpgradeStatus: Upgraded to focal on 2021-12-29 (6 days ago)