Update cmd/xpumanager_sidecar/README.md

Co-authored-by: Mikko Ylinen <[email protected]>

Author: tkatila

cmd/xpumanager_sidecar/README.md

@@ -76,7 +76,7 @@ master,0.0-1.0_0.1-1.1
 
 ### Use HTTPS with XPU Manager
 
-There is an alternative deployment that uses HTTPS instead of HTTP. The deployment requires `cert-manager` to provide a certificate for TLS. To deploy:
+There is an alternative deployment that uses HTTPS instead of HTTP. The reference deployment requires `cert-manager` to provide a certificate for TLS. To deploy:
 
 ```bash
 $ kubectl apply -k 'https://github.com/intel/intel-device-plugins-for-kubernetes/deployments/xpumanager_sidecar/overlays/cert-manager?ref=<RELEASE_VERSION>'