broken links on README.md

[sishtiaq]

These links, in the Hygiene section, don't lead anywhere:

Bidet Hose Toilet Attachment -
Buy a F**king Bidet -
RazorPit -

[Pierre-VF]

On that note, if you want to automate the flagging of dead links, you can actually reuse the system I created in my repository here: https://github.com/Pierre-VF/OpenClimateResources (which uses a combination of python scripts and github actions to automatically open pull requests when changes are found)