Note advantages over sole hyprsunset

[danielwerg]

hyprwm/hyprsunset#41 added config which let's you change temp and gamma at specific time. I think it's worth updating readme to clearly list advantages of sunstr to hyprland users, such as gradual transition and geo stuff. I haven't used neither hyprsunset nor sunsetr since around may so I don't think I'm the best person to do this.

[psi4j]

Thanks for bringing this to my attention. I'm updating the README to reflect the added benefits.