replace "todo" link with real links

https://doc.zih.tu-dresden.de/software/overview/ https://doc.zih.tu-dresden.de/data_lifecycle/overview/

mentioned in commit 4f240fc6

mentioned in merge request !370 (merged)

assigned to @mflehmig--tu-dresden.de

mentioned in merge request !371 (merged)

Thank you for filing this issue. It should be fixed with !371 (merged)

mentioned in commit cc657249

closed with merge request !371 (merged)