path.zsh: fix pyenv init
path.zsh: fix pyenv init

jfc, I spent like 45 minutes on this because pyenv changed the way it
does init (https://github.com/pyenv/pyenv/pull/1898), and then removed
the warning about it two months later, because "it had served its
purpose".

mmcclimon/dotfiles,mmcclimon/dotfiles,mmcclimon/dotfiles