Github Pages intro docs typo fix

[chrisdawww]

What article on docs.github.com is affected?

Adding content to your GitHub Pages site using Jekyll

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

Under the "Adding a new post to your site" section, the example YAML front matter contains layout: page instead of layout:post. This is a very simple change to swap that YAML value to post instead.

Additional information

None

[welcome]

Thanks for opening this issue. A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[janiceilene]

This was fixed in #1685 🎉