Clarify the shutdown.rb description
Clarify the shutdown.rb description

megumisonoda/discordrb,meew0/discordrb,megumisonoda/discordrb,Roughsketch/discordrb,meew0/discordrb,Roughsketch/discordrb,VxJasonxV/discordrb,VxJasonxV/discordrb