With latest yq syntax:

curl -sS https://charts.helm.sh/stable/index.yaml | 
    yq  '.entries[].[] | pick(["name", "version"]) | . style="flow"'

result:

{name: acs-engine-autoscaler, version: 2.2.2}
{name: acs-engine-autoscaler, version: 2.2.1}
{name: acs-engine-autoscaler, version: 2.2.0}