[autosuggestions] Update submodule to version v0.5.0
[autosuggestions] Update submodule to version v0.5.0

Main change we're interested in with this release is:
> Change `config.zsh` to keep previously set values of config vars
> https://github.com/zsh-users/zsh-autosuggestions/issues/335

Fixes #301

joshuarubin/dotfiles,joshuarubin/dotfiles,joshuarubin/dotfiles,Eriner/zim,joshuarubin/dotfiles