docs: remove broken blockquote from helm tutorial

Created by: michaellzc

markdown doesn't like having blockquotes in between ordered list items and it looks horrible, so we might as well remove the fancy blockquote

https://docs.sourcegraph.com/admin/deploy/kubernetes/helm#configure-sourcegraph-on-elastic-kubernetes-service-eks https://docs.sourcegraph.com/admin/deploy/kubernetes/helm#configure-sourcegraph-on-azure-managed-kubernetes-service-aks

Test plan

sg run docsite