fix deploy site on release action

[boneskull]

It's not working atm because it needs git username/pass.
This is no good anyway. Find another action. fix.

[boneskull]

here's an example https://github.com/tc39/proposal-module-attributes/blob/master/.github/workflows/publish.yml

[boneskull]

so we should then use https://github.com/peaceiris/actions-gh-pages