Fix broken links

[dialex]

The validation is passing, but links like ../notebook/something.md do not work.

[dialex]

Conclusion

PROD

• OK same folder, absolute
• OK diff folder, absolute
• NOK same folder, relative two dots
• NOK diff folder, relative two dots
• NOK same folder, relative single dot
• NOK same folder, relative no dot

LOCAL

• OK same folder, absolute
• OK diff folder, absolute
• OK same folder, relative two dots
• OK diff folder, relative two dots
• NOK same folder, relative single dot
• NOK same folder, relative no dot

Therefore, the notation that works both locally and on production is the absolute path /folder/file.md. However this is considered invalid by the validator... guess I'll have to make my own 💩