Update README.md

Signed-off-by: Chandra Keshav Mishra <[email protected]>

README.md

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 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=mosip_id-authentication&id=mosip_id-authentication&branch=release-1.2.0.1&metric=alert_status)](https://sonarcloud.io/dashboard?id=mosip_id-authentication&branch=release-1.2.0.1)
 
 # ID-Authentication 
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+## Note: This branch is created to host updated testrig code for CRE checks.
 ## Overview
 This repository contains source code and design documents for MOSIP ID Authentication which is the server-side module to manage [ID Authentication](https://docs.mosip.io/1.2.0/modules/id-authentication-services). The modules exposes API endpoints.