I have the environment created named "main", but the workflow below errors out:
environment created:

Below is my github workflow:
name: Deploy ADf ARM    
on:
  workflow_dispatch:
environment: 
  name: main
jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    steps:
      # Checkout code
    - uses: actions/checkout@main
      ...
at present it notes the error:
The workflow is not valid. .github/workflows/deploy-adf-arm.yml (Line: 7, Col: 1): Unexpected value 'environment'
How can I reference this environment to work?