README.md Ghostty hook broken

[ParadaCarleton]

Missing open/close quotation mark:

hook = "command cp -f %f ~/.config/ghostty/themes/tinted-theming" && killall -SIGUSR2 ghostty"

[josswright]

Just came here to report this. For reference, it should be:

hook = "command cp -f %f ~/.config/ghostty/themes/tinted-theming && killall -SIGUSR2 ghostty"

(Losing the " after tinted-theming in the current version.)