Deprecated or deleted API version in "rbac" in examples

[Dor1ma]

Is your feature request related to a problem? Please describe.
Some examples in /examples directory contains deprecated or deleted version of RBAC API (v1beta1) in "shell-operator-rbac.yaml". This causes a nasty but simple error

Describe the solution you'd like to see
Because this API version is outdated or has been removed, I suggest replacing v1betav1 with v1. At least in my case it worked (Kubernetes 1.22)

Describe alternatives you've considered
Currently, as an alternative, the end user will have to change the config from the example manually

Additional context
After a little research I found a following information:

• In Kubernetes 1.17 API rbac.authorization.k8s.io/v1beta1 was marked as 'deprecated'
• In Kubernetes 1.22 this API was finally removed