fix numbering of steps in quickstart
fix numbering of steps in quickstart

Signed-off-by: Joe Heck <be1bd371cc749ae5686d4c156026d6a402a6ac69@mac.com>

jetstack/cert-manager,jetstack-experimental/cert-manager,cert-manager/cert-manager,jetstack/cert-manager,jetstack-experimental/cert-manager,jetstack/cert-manager,cert-manager/cert-manager,jetstack-experimental/cert-manager,cert-manager/cert-manager