Update recommended table formatter

What does this MR do?

While reviewing !128876 (merged), I saw had some funky formatting and notes to try to avoid automatically adding whitespace.

I decided to make use of the newly released version of the VS Code Markdown Formatter. There is a brand new feature that the maintainer added (at my request, with my proposed UI text too 😅) that I wanted to test and see if it would handle the whitespace, and it did a great job cleaning everything up!

I think this tool is so good, we should make it the standard and strongly recommend it, so I'm adding it to the style guide.

I've also run it on a selection of random tables in the CI docs to see if it helps there, and it does seem to work extremely well! 🎉

Related issues

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