zsh completion: Fix autoload function boilerplate
zsh completion: Fix autoload function boilerplate

Inspired by https://github.com/robbyrussell/oh-my-zsh/commit/4b20bfe0ee4c5ae85a926b7c496b34cf9091f5f5

tbabej/task,tbabej/task,tbabej/task,tbabej/task,tbabej/task