updted Helm install guide in installation page. -  link to getting started with kubernetes access page to refer Helm which is more up to date guide - removed  which shows deprecated warning
updted Helm install guide in installation page.
-  link to getting started with kubernetes access page to refer Helm which is more up to date guide
- removed  which shows deprecated warning

gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport