Instructions to create a GH Pages site with Jekyll should indicate Ruby version

[bewuethr]

Code of Conduct

• I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

• Creating a GitHub Pages site with Jekyll
• Testing your GitHub Pages site locally with Jekyll

What part(s) of the article would you like to see updated?

The articles describe how to create a Jekyll site for GitHub Pages from scratch and testing the site locally, including the installation of Ruby. Now, the gem used for GitHub Pages, github-pages, has Jekyll 3.9.0 as a dependency, and that version of Jekyll doesn't work with Ruby 3+ (see here for the error when trying to build with Ruby 3).

Thus, the instructions should indicate that the Ruby version to install should be 2.x, and not 3.x.

Additional information

No response

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[mmvvmm37123mgc]

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