Renames ACCESS_TOKEN to GITHUB_TOKEN

[ivoputzer]

Description
Renames ACCESS_TOKEN env-variable to GITHUB_TOKEN.

As of right now, Github allows you to use the GITHUB_TOKEN variable directly from within the workflow without any further configuration so to me it makes sense to name the variable accordingly.

https://developer.github.com/actions/managing-workflows/storing-secrets/#github-token-secret

WDYT?

Testing Instructions
I have setup a workflow at https://github.com/ivoputzer/github-page which uses the fork as of right now.

[JamesIves]

@ivoputzer Thanks for the PR!

The problem with this is that the GITHUB_TOKEN variable that is provided with Github Actions doesn't have sufficient permissions to trigger a re-deploy of the gh-pages branch. Using this will prevent your new changes from being deployed consistently. The work around for this is to use a Personal Access Token to force Github pages to re-build.

There's a related issue to this here: #5

I don't think anything has changed on Github's end to make this work, but if you're having better luck with it I can give it a try and perhaps send of a few emails to their team.

[JamesIves]

Closing this in favor of #13 - I appreciate the help with this one!