Update 20486C_MOD03_DEMO.md
Update 20486C_MOD03_DEMO.md

resolving bugs# 83526, 83524, 83532, 83533, 83536, 83534, 83537, 83538, 83539, 83540, 83535
MicrosoftLearning/20486-DevelopingASPNETMVCWebApplications,MicrosoftLearning/20486-DevelopingASPNETMVCWebApplications,MicrosoftLearning/20486-DevelopingASPNETMVCWebApplications