Update screenshots

[jules32]

• explore.qmd screenshots, for example the screenshot of files on github, after the filetypes stabilize

[stefaniebutland]

in https://openscapes.github.io/quarto-website-tutorial/explore.html#the-websites-repo, text is up to date "click inside “quarto-workflows”" but screenshot shows "basic-workflows"

[jules32]

Yes this is a perfect example of a screenshot to update! And also the _yml file screenshot

https://openscapes.github.io/quarto-website-tutorial/explore.html#quarto.yml-intro