Document how to get more disk space

[zeke]

Sometimes workflows fail because the environment runs out of disk space. Let's update the docs and examples with advice on how to work around this.

Use an Action to delete stuff

    steps:
      - name: Free disk pace
        uses: jlumbroso/free-disk-space@main
        with:
          tool-cache: false
          docker-images: false

      - name: Checkout
        uses: actions/checkout@v4

Use a bigger hosted runner

https://docs.github.com/en/actions/using-github-hosted-runners/about-larger-runners/about-larger-runners#machine-sizes-for-larger-runners