Clarify legal terminology in shownotes
The usage of legal terminology in the shownotes is ambiguous: https://gitlab.dlr.de/dlr-se-workshops/sustainable-sw-dev-for-researchers/workshop-materials-mirror/-/blob/master/episodes/04_add-license.md#L123.
Copyright is a personal right an cannot be waived. Verwertungsrechte are something different. While I think this is clear in the detailed descriptions, this instance in the show notes isn't as clear, and I suggest to change it.