zfs completions are outdated

[HorstBort]

Completions for some zfs commands are outdated, especially related to dataset encryption.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