Update 20532C_LAB_07.md (#116)
Update 20532C_LAB_07.md (#116)

Corrected Name of variable in text and removed unnecessary "\".
MicrosoftLearning/20532-DevelopingMicrosoftAzureSolutions,MicrosoftLearning/20532-DevelopingMicrosoftAzureSolutions,MicrosoftLearning/20532-DevelopingMicrosoftAzureSolutions