Update how-to-register-device-portal.md

Update Connection string section to match Azure portal text

Author: theangellmethod

articles/iot-edge/how-to-register-device-portal.md

@@ -39,8 +39,8 @@ All the edge-enabled devices that connect to your IoT hub are listed on the **Io
 When you're ready to set up your device, you need the connection string that links your physical device with its identity in the IoT hub.
 
 1. From the **IoT Edge** page in the portal, click on the device ID from the list of Edge devices. 
-2. Copy the value of either **Connection string—primary key** or **Connection string—secondary key**. 
+2. Copy the value of either **Connection string (primary key)** or **Connection string (secondary key)**. 
 
 ## Next steps
 
-Learn how to [Deploy modules to a device with the Azure portal](how-to-deploy-modules-portal.md)
+Learn how to [Deploy modules to a device with the Azure portal](how-to-deploy-modules-portal.md)