Update 20487C_MOD03_DEMO.md
Update 20487C_MOD03_DEMO.md

resolving bugs#: 88811, 88433, 88434, 88436
MicrosoftLearning/20487-DevelopingWindowsAzureAndWebServices,MicrosoftLearning/20487-DevelopingWindowsAzureAndWebServices,MicrosoftLearning/20487-DevelopingWindowsAzureAndWebServices