fix(provider/kubernetes): link to client cert docs (#784)
fix(provider/kubernetes): link to client cert docs (#784)

* fix(provider/kubernetes): link to client cert docs

* fix(provider/kubernetes): update wording

spinnaker/spinnaker.github.io,ttomsu/spinnaker.github.io,ttomsu/spinnaker.github.io,spinnaker/spinnaker.github.io,spinnaker/spinnaker.github.io,ttomsu/spinnaker.github.io