Fix bad command check for gls
Fix bad command check for gls

We were checking if `grc` is present and then using `gls` in the `alias`
command. Check for `gls` instead.

Closes #137

Signed-off-by: Joe Block <13bb081c6ac072ef78a3e348068e2204400d7335@unixorn.net>

unixorn/zsh-quickstart-kit