'triggers' found in 'action' clause in project.yml

We are getting following build error when trying to build function attached to app platform.

✘ an error occurred while parsing project.yml:
Error:   : Invalid project configuration file (project.yml): Invalid key
›   'triggers' found in 'action' clause in project.yml

project.yml

packages:
  - name: sample
    functions:
      - name: payouts
        binary: false
        runtime: "nodejs:18"
        web: true
        environment:
          DATABASE_URL: "${foo.DATABASE_URL}"
        limits:
          timeout: 3000
          memory: 128
        triggers:
          - name: daily-payout-10pm
            sourceType: scheduler
            sourceDetails:
              cron: "00 22 * * *"