Add Github Action to link check the README

[booyaa]

Acceptance criteria

• Create a separate workflow called markdown.yml do not use an existing workflow if found.
• Call this workflow (if possible) from the main workflow CI.yml
• Bonus: if you can find a GitHub Action that does linting i.e. make sure it's valid Markdown/HTML. Doesn't need to be the same Action that does link checking.

[lionel-faber]

Hey @booyaa
Just to confirm you are looking to add a GH action to run lint checks on the README file?

[booyaa]

Hey @booyaa
Just to confirm you are looking to add a GH action to run lint checks on the README file?

A link checker would be fine (there's a few actions available that do the job). I'll update issue to reflect this.