Correct syntax error in /espi/1_1/Notify_SubscriptionAvailable responseMessage code 204 entry
Correct syntax error in /espi/1_1/Notify_SubscriptionAvailable responseMessage code 204 entry

energyos/OpenESPI-GreenButton-API-Documentation,TronEnergy/OpenESPI-GreenButton-API-Documentation,TronEnergy/OpenESPI-GreenButton-API-Documentation,energyos/OpenESPI-GreenButton-API-Documentation