Documentation for the zone-sync

[jjngx]

Add documentation for zone-sync and OIDC without security (TLS) support

Acceptance Criteria

• update configmap values with the new avaiable keys
• update any existing OIDC example to fit with the new update version
• add notice to users about existing users using the zone_sync snippet not working with new zone-sync key

[github-actions]

Hi @jjngx thanks for reporting!

Be sure to check out the docs and the Contributing Guidelines while you wait for a human to take a look at this 🙂

Cheers!