[Relay] Add Quetzalcoatl Relays to the Relay Associations page

[quetzalcoatl-relays]
link = https://quetzalcoatl-relays.org/
image = 
label = quetzalcoatl-relays
country = UK
contact = quetzalcoatl_relays@proton.me
active = True
display = True
donate = https://quetzalcoatl-relays.org/#support-us