Inconsistent formatting in gh-foundations.md

[thaddeuspearson]

I noticed there is some inconsistency with the formatting in gh-foundations.md, specifically in the GitHub Markdown section: https://github.com/LadyKerr/github-certification-guide/blob/b929e77f578e60b04b6079c8e598d26496cad467/study-guides/gh-foundations.md?plain=1#L113

Every other objective under each subheading is wrapped in a code block, but this section is not. If you would like to assign this to me, I would be more than happy to put in a quick fix for it!