Action failing on GitHub Enterprise server

[palloberg]

The action does not work when using GitHub Enterprise Server (GHES) as Octokit's getLatestRelease will use the local server API instead of reaching out to GutHub.com for the latest release of mozilla/sccache and thus fail.

For this to work on GHES the baseUrl must be hardcoded to https://api.github.com when calling getOctokit in setup.ts:

const octokit = getOctokit(token, {baseUrl: 'https://api.github.com'});

Users of the action must provide the token parameter when calling the action, i.e.:

      - uses: mozilla-actions/sccache-action@main
        with:
          token: ${{ secrets.MY_GITHUB_TOKEN }}

(preferably obtaining the token using https://github.com/actions/create-github-app-token).