Fix typo in zsh installation instructions (#1158)
Fix typo in zsh installation instructions (#1158)

Refs #1127 and just fixes a small typo to make the installation instructions actually work.

Signed-off-by: Sebastian Schulze <c2208abde9668e8e9815c3690855edd1e63abeac@bascht.com>
justwatchcom/gopass,franciscocpg/gopass,gopasspw/gopass,gopasspw/gopass