Fix typo in zsh installation instructions
Refs and just fixes a small typo to make the installation instructions actually work.
@@ -289,7 +289,7 @@ If you use zsh, `make install` or `make install-completion` should install the c
If zsh autocompletion is still not functional, you can run the following commands:
```
-$ gopass completion zsh > $/_gopass
+$ gopass completion zsh > ~/_gopass
$ sudo mv ~/_gopass /usr/share/zsh/site-functions/_gopass
$ rm -i ${ZDOTDIR:-${HOME:?No ZDOTDIR or HOME}}/.zcompdump && compinit
