Annotation `autoscaling.alpha.kubernetes.io/behavior` not registered / documented

[sftim]

This is a Bug Report

Problem: Early Kubernetes used an annotation, autoscaling.alpha.kubernetes.io/behavior. However it's not officially registered.

Proposed Solution: We should register the annotation, marking it deprecated.

Page to Update: https://kubernetes.io/docs/reference/labels-annotations-taints/

Additional Information: /language en /lifecycle frozen /sig autoscaling

[dipesh-rawat]

/priority backlog /triage accepted

[ayushpatil2122]

/assign