User manual content update

Author: TaddyHC

content/hardware/07.opta/opta-family/opta/tutorials/01.user-manual/content.md

@@ -1213,7 +1213,9 @@ You should be able now to connect to your Opta™ using a central device. The Bl
 
 ## OPC Unified Architecture (OPC UA)
 
-This section explains using the [**OPC UA library**](https://github.com/arduino-libraries/Arduino_OPC_UA) designed for Opta. The library is based on the [**Fraunhofer open62541**](https://github.com/open62541/open62541) implementation of [**OPC UA**](https://en.wikipedia.org/wiki/OPC_Unified_Architecture), created specifically for the Opta family.
+This section explains using the [**OPC UA library**](https://github.com/arduino-libraries/Arduino_OPC_UA) designed for Opta.
+
+The library is based on the [**Fraunhofer open62541**](https://github.com/open62541/open62541) implementation of [**OPC UA**](https://en.wikipedia.org/wiki/OPC_Unified_Architecture), created specifically for the Opta family.
 
 The [**OPC Unified Architecture (OPC UA)**](https://en.wikipedia.org/wiki/OPC_Unified_Architecture) is an industrial communication protocol widely used in automation and Industrial Internet of Things (IIoT) systems.
 
@@ -1349,6 +1351,8 @@ It will launch the GUI and connect to the OPC UA server running on the Opta usin
 
 With this, Opta is now ready to handle the OPC UA protocol related issues using a simple [OPC UA GUI client](https://github.com/FreeOpcUa/opcua-client-gui).
 
+***For more information about the simple OPC UA GUI client and dedicatd installation instruction sets, please refer to [**opcua-client-gui** repository](https://github.com/FreeOpcUa/opcua-client-gui).***
+
 ### Memory Debugging Insight
 
 Additional configuration is possible for developers requiring detailed heap and stack memory usage information. The `mbed_app.json` configuration file should be modified to include memory and stack statistics macros to enable this feature.