Update README.md (#276)

101-vm-windows-apply-extension-customscript-cmd/README.md

@@ -1,3 +1,3 @@
 # Deploy Custom Script VM Extension to existing Windows VM (with command)
 
-This template deploys the Custom Script VM Extension to existing Windows VM in the Azure Stack POC environment. It takes a parameter for vmName, and allows for the execution of a command (as seen in the commandToExecute Extension setting).
+This template deploys the Custom Script VM Extension to an existing Windows VM in an Azure Stack environment. It takes a parameter for vmName, and allows for the execution of a command (as seen in the commandToExecute Extension setting).