Update README.md

Small change to fix Sonar cloud badges

Author: timireland

README.md

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 # NHS Notify Supplier API
 
 [![1. CI/CD pull request](https://github.com/NHSDigital/nhs-notify-supplier-api/actions/workflows/cicd-1-pull-request.yaml/badge.svg)](https://github.com/NHSDigital/nhs-notify-supplier-api/actions/workflows/cicd-1-pull-request.yaml)
-[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=nhs-notify-supplier-api&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=nhs-notify-supplier-api)
+[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=NHSDigital_nhs-notify-supplier-api&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=NHSDigital_nhs-notify-supplier-api)
 
 The NHS Notify Supplier API is intended primarily for print suppliers to integrate with the NHS Notify message request queueing system.