Contact Association API schema incorrectly labels role as not required

[joewesch]

Environment

• Nautobot version (Docker tag too if applicable): 2.3.0
• Python version: 3.11.9
• Database platform, version:
• Middleware(s):

Steps to Reproduce

1. Try and create a contact association via API based on provided schema:

Expected Behavior

I expected role to be required since it's required in the UI

Observed Behavior

Role is not required, but responds with error:

{
  "role": [
    "This field cannot be null."
  ]
}