docs: Add security vulnerability disclaimer

Users of this solutions are responsible for ensuring that the components
they use contain all the required security fixes, if and when they
deploy a product derived from Arm reference solutions.

Signed-off-by: Hugues Kamba-Mpiana <hugues.kambampiana@arm.com>

README.md

 # Open IoT SDK
 
+---
+
+__🚨Disclaimer:__
+
+*_Arm reference solutions are Arm public example software projects that track and pull upstream components, incorporating their respective security fixes published over time._*
+*_Users of these solutions are responsible for ensuring that the components they use contain all the required security fixes, if and when they deploy a product derived from Arm reference solutions._*
+
+---
+
 ## Overview
 
 The Open IoT SDK is a staging area for integrations of both Arm developed and selected third party software, that we use to showcase the capabilities of newly released Arm Corstone subsystems, before we look to upstream our code to the repos of the key IoT ecosystem projects, mainly FreeRTOS, Azure RTOS.

release-changes/202401121129.change

+docs: Add security vulnerability disclaimer