Quay 3.6.0 guide should provide steps of how to add user's own tls cert when tls component is unmanaged

Description:

This is a Doc issue in Quay 3.6.0 guide, in the following section once Quay customers want to use unmanaged tls component, and they want to add their TLS cert/key pair into config bundle secret directly, Quay guide should give examples.

Docs: https://gabriel-rh.github.io/quay-docs/downstream/deploy_quay_on_openshift_op_tng/html-single/#operator-preconfig-tls-routes 

3.4. CONFIGURING TLS AND ROUTES

• If TLS is unmanaged then you must supply certs, either with the config tool or directly in the config bundle

How to create config bundle secret including user's tls cert/key pair:

oc create secret generic --from-file config.yaml=./config.yaml --from-file ssl.cert=./ssl.cert --from-file ssl.key=./ssl.key config-bundle-secret