Update tutorial to avoid problems with github actions

[ronnyhdez]

We had a problem following the instructions because there are some few changes with github actions where we need to update some permissions to be able to render the complete site and not just the README file.

[jules32]

A few more details to update:

1. This is now a template, not fork: https://openscapes.github.io/quarto-website-tutorial/explore.html#setup-github-action

2. the .yml already exists, so this is out of date: https://openscapes.github.io/quarto-website-tutorial/explore.html#setup-github-action