Check link checking problem

# Description

- after update to Docusaurus 3, some link checks fail when running `npm run start` for valid and working links to `.md` files. It's always file where the path is e.g. `../../docs`. The link do work, so we may be able to set the broken link check to `warn`. It's recommended to use `.md` links when possible.

BUT
- the markdown-link-check job in the pipeline currently does not fail the job when it's having an error. This needs to be fixed before changing the `error` to `warn`

## Todo
- get link check pipeline to fail when it should
- check why brokenLinkCheck for docusaurus fails, if needed set to warn instead of error