HorizontalPodAutoscaler API version is deprecated
autoscaling/v2beta1
is the current API version in this chart's hpa.yaml and is also deprecated. Find it in the changelog bullet points here: https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.19.md#deprecation
This API version should be bumped to the next undeprecated version of the autoscaling API.