Task: Receive updates for Calendly events

n8n workflow JSON:
{"nodes":[{"name":"Calendly Trigger","type":"n8n-nodes-base.calendlyTrigger","position":[880,400],"webhookId":"9d13bcea-781a-4462-a9af-44bfb1fb6891","parameters":{"events":["invitee.created","invitee.canceled"]},"credentials":{"calendlyApi":"calendly_creds"},"typeVersion":1}],"connections":{}}