project-assigner does not support beta projects

[tylersmalley]

@jasonrhodes from the Infra Monitoring team is looking to use the beta projects. For now, he will attempt to use richkuz/projectnext-label-assigner@1.0.2 in elastic/kibana#126921

Not sure how much of a priority this will be with the org level discussion to move to Jira - but will hopefully raise awareness to the shortcoming.

[Ikuni17]

GH classic projects were sunset in April 2025. This action no longer works and will also be sunset.