Docs feedback: Add helm3/k8s 1.16+ restrictions

Problem to solve

Please add to https://docs.gitlab.com/charts/ that the chart currently does not support 1.16+ kubernetes, or Helm3. I just wasted 3 hours trying to figure out what I was missing.

Proposal

Please add to https://docs.gitlab.com/charts/ that the chart currently does not support 1.16+ kubernetes, or Helm3. I just wasted 3 hours trying to figure out what I was missing.

Who can address the issue

Other links/references