Commit back to the repository from a workflow

master.yml

name: Commit from workflow
on:
  push:
    branches:
      - master
    paths-ignore:
      - file.txt
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - name: Commit some stuff
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          git config user.email "user@example.com"
          git config user.name "User Name"
          git remote set-url origin https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git
          git checkout master
          echo "foo" >> file.txt
          git add file.txt
          git commit -m "Some commit message"
          git push origin master