update README

Author: xianqiliu

README.md

@@ -404,10 +404,10 @@ Destination[] directDestinations = amadeus.airport.directDestinations.get(Params
 FlightAvailability[] flightAvailabilities
   = amadeus.shopping.availability.flightAvailabilities.post(body);
 
-// Travel Restrictions GET V1
+// Travel Restrictions v1 GET
 DiseaseAreaReport diseaseAreaReport
   = amadeus.dutyOfCare.diseases.covid19AreaReport.get(Params.with("countryCode","US"));
-// Travel Restrictions GET V2
+// Travel Restrictions v2 GET
 DiseaseReport diseaseReport
   = amadeus.dutyOfCare.diseases.covid19Report.get(Params.with("countryCode","US"));