Update 20487C_MOD12_DEMO.md
Update 20487C_MOD12_DEMO.md

Fixed Bugs: #89980, #89986, #89988 #89983 #89987 #89982
MicrosoftLearning/20487-DevelopingWindowsAzureAndWebServices,MicrosoftLearning/20487-DevelopingWindowsAzureAndWebServices,MicrosoftLearning/20487-DevelopingWindowsAzureAndWebServices