Merge pull request #426 from WilantNackaerts/master

Update AZ400_M03_L06_Deploying_Docker_containers_to_Azure_App_Service…

Author: LuizMacedo

Instructions/Labs/AZ400_M03_L06_Deploying_Docker_containers_to_Azure_App_Service_web_apps.md

@@ -174,7 +174,7 @@ In this task, you will add a new role assignment to allow Azure App Service pull
     ```sh
     spId=$(az ad sp list --display-name sp-az400-azdo --query "[].id" --output tsv)
     echo $spId
-    roleName=$(az role definition list --name "User Access Administrator" --query [0].name --output tsv)
+    roleName=$(az role definition list --name "User Access Administrator" --query "[0].name" --output tsv)
     echo $roleName
     ```