Istio 1.5.4 cpu resource limits, analyze erros

Trying to use use new annotations proxyCPULimit and proxyMemoryLimit in istio 1.5.4 which appears to be merged PR #22468 and mentioned here https://istio.io/news/releases/1.5.x/announcing-1.5.2/

but on creating a new deployment, seeing errors in istioctl analyze :

Warn [IST0108] (Pod xxxxxxxxx) Unknown annotation: sidecar.istio.io / proxyCPULimit
Warn [IST0108] (Pod xxxxxxxxx) Unknown annotation: sidecar.istio.io / proxyMemoryLimit