Resolve "HorizontalPodAutoscaler: autoscaler/v2beta2 is not available in K8s 1.26"

General MR

Updated any instance of using the previous version of autoscaler.

Summary

Fixes installation error when installing HPA.

Sample override: values: hpa: enabled: true postgresql: install: true istio: enabled: true confluence: gateways: - istio-system/public

Linked Issue

issue

Upgrade Notices

N/A

Closes #24 (closed)