Update HTTP.GetDevice.V1 regex

Author: amclain

protocol/http/devices/get.v1.ex

@@ -4,4 +4,4 @@ name "get_device"
 endpoint "/device/:uuid"
 verb "get"
 
-attribute :uuid, :string, format: ~r/\Ad{5}\-d{5}\-d{5}\-d{5}\-d{5}\z/
+attribute :uuid, :string, format: ~r/\A\d{5}\-\d{5}\-\d{5}\-\d{5}\-\d{5}\z/