There's a guide at https://docs.github.com/en/pages/getting-started-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site https://docs.gi

There's a guide at https://docs.github.com/en/pages/getting-started-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site https://docs.github.com/en/pages/getting-started-with-github..., but the critical bit is "In the "Code and automation" section of the sidebar, click Pages."