knative-operator v1.8 may be restricted to k8s<1.26

[ca-scribner]

While updating the knative-operator charm to use knative v1.8.x, I saw this error in the knative-operator logs:

knative-operator 1.8.1 showed this warning: 
* 2023-03-06T16:32:31.290Z [/ko-app/operator] {"severity":"WARNING","timestamp":"2023-03-06T16:32:31.290011056Z","logger":"knative-operator","caller":"logging/warning_handler.go:32","message":"API Warning: autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler","commit":"e0ef2a2-dirty","knative.dev/pod":"knative-operator"}

Does this mean v1.8.x will not work in k8s 1.26+? If so, might be worthwhile to update to operator v1.9+, even if we want to keep the knative serving and eventing versions on 1.8.x, just so we can move to k8s 1.26. The knative-operator can deploy serving/eventing up to 3 minor versions older, so a v1.10 operator can deploy serving v1.8.