chore(docs): Reformat "Hosting on Netlify" docs (#15874)
chore(docs): Reformat "Hosting on Netlify" docs (#15874)

* chore(docs): Reformat "Hosting on Netlify" docs

* Remove mystery horizontal line

* Revert markdown script type to text from shell

gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby