Links should be updated for Z-STAGE

[edabngl]

many links are broken in Z-stage based on a linear slide (Objective/Sample). Or new Z-stage repository can be mentioned instead of updating this page.

[beniroquai]

Hey @edabngl that's indeed true. Would you mind checking the links and make the changes? I could also do that of course. Let me know what's your availability. We could also organize a hackathon to cleanup the repo ;-)