Helm reference install commands are improperly formatted

[krumware]

in

everest-doc/docs/quick-install.md

Line 92 in 24f5293

helm --install everest percona/everest \

and

everest-doc/docs/install/install_everest_and_expose_via_ingress.md

Line 37 in 24f5293

helm --install everest percona/everest \

The helm command is improperly formatted. Users will receive an error:

Error: unknown command "percona/everest" for "helm"
Run 'helm --help' for usage.

It looks like the upgrade command is simply missing.

So instead of

helm --install

it should read

helm upgrade --install

[igroene]

thank you for reporting this!