rms-support-letter.github.io/.github/workflows/check-pr.yml

name: Do not modify index.md directly, add a file to _data/signed instead
on:
  pull_request:
    branches:
      - master
    paths:
      - index.md
jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Throw error
        run: echo "Do not modify index.md directly, add a file to _data/signed instead"; exit 1