Wrong modelUrl for notificationsource

[titorau]

Environment

• Python version: 3.11.9
• Nautobot version: 2.2.8
• nautobot-circuit-maintenance version: 2.2.3
• URL: https://demo.nautobot.com/

Steps to Reproduce

1. Call OPTIONS method on the following endpoint: https://demo.nautobot.com/api/plugins/circuit-maintenance/rawnotification/
2. Take a look at the source modelUrl

Expected Behavior

The modelUrl for notification sources matches the endpoint URL.
"modelUrl": "/plugins/circuit-maintenance/notificationsource/"

Observed Behavior

"modelUrl": "/plugins/circuit-maintenance/source/"

[chadell]

solve in #320 , it will come in a next major release because it's a breaking change