Update ARM Bicep documentation to use extension kubernetes instead of import '[email protected]'

[danielhagstromsogeti]

Bicep version
Bicep CLI version 0.31.92 (b065093) (although wholly irrelevant :) )

Describe the bug
In the Azure Resource Manager documentation for Bicep, the section on Extensions still use the deprecated syntax from #14374
As of 2024-12-04, from Import Kubernetes extension:

@secure()
param kubeConfig string

import '[email protected]' with {
  namespace: 'default'
  kubeConfig: kubeConfig
} as k8s

To Reproduce
Open the documentation and read the example using the deprecated syntax.

Additional context
The issue #14374 has the checkbox/task Revise public documentation to use the term extension. checked, whereas at least here the public documentation is still referring to the old syntax. The linked page was updated 08/08/2024 last.

[stephaniezyen]

@shenglol can you work with Jonathan on this?

[shenglol]

Yeah, sure thing.

[shenglol]

I was under the impression that the docs were updated. It seems Jonathan's doc update PR got closed without being merged. I just let him know about this.