Automate commit messages showing what folders were changed

[nikitavoloboev]

Separate multiple folders with comma.

i.e.

life, research: update

[lyz-code]

Hi @nikitavoloboev, if you ever switch to MkDocs, you may like mkdocs-newsletter to keep your readers updated on the site changes, it is a little bit more complex on what you plan to do with this issue, but the results are worth the effort :)