Error in the article that reference this repo

[enricobottazzi]

Hi guys, thanks for the repo and the excellent guide to it

In the article the section "Applying all of this to a GitHub repo" uses an incorrect path to the md files

        markdown_files = list(repo_path.glob("*/*.md")) 

instead of

      markdown_files = list(repo_path.glob("**/*.md")) 

As correctly included in the repo

Please consider modifying the article as I might create bugs for people as they couldn't properly fetch md files from their github repo