message: Update GitHub action to work for PRs from forks
diff: @@ -13,9 +13,7 @@ jobs:
  - name: Checkout
  uses: actions/checkout@v2
  with:
  - # Make sure the actual branch is checked out when running on pull requests
  - ref: ${{ github.head_ref }}
  - # This is important to fetch the changes to the previous commit
  + ref: ${{ github.event.pull_request.head.sha }}
  fetch-depth: 0
  - name: Prettify code
  uses: creyD/prettier_action@v3.1
  