[DOCS] Fix Helm3 install guide in regard of "deploy" step

In contrary to helm v2 behaviour helm v3 does not automatically create
namespace even if "--namespace" option is passed to it's "install" or "upgrade"
subcommand. Additional flag "--create-namespace" has to be set. Alternatively
namespace can be created manually before running "helm deploy" without that
flag.

Change-Id: I3c425667db3065e2aa04a8f140e1037d5080c96a
Issue-ID: OOM-2562
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
1 file changed