Update services.yaml

Please add the details of exchange crxzone.com we have sent a request directly also but not updated yet. 

www.crxzone.com
Crypto currency (bitcoin and litecoin) exchange registered and operated in singapore catering for global customers through Fiat Deposit and other digital currency payment systems. Trading Multiple Pair Bitcoin ( BTC/USD, BTC/EUR, BTC/SGD, BTC/LTC) and Litecoin ( LTC/USD, LTC/EUR, LTC/SGD)