fix missing continuation character

Author: david-peden-q2

articles/azure-app-configuration/quickstart-resource-manager.md

@@ -120,7 +120,7 @@ Before you can apply key-values to the VM, you must have an existing Azure App C
 
    ```azurepowershell
    New-AzResourceGroupDeployment `
-       -ResourceGroupName "<your resource group>" 
+       -ResourceGroupName "<your resource group>" `
        -TemplateFile "<path to prereq.azuredeploy.json>" `
        -TemplateParameterFile "<path to prereq.azuredeploy.parameters.json>"
    ```