Add another exercise

[bpiereck]

https://github.com/ELIXIR-FAIR-Training/FAIR-training-handbook/blob/5eb61792692189e7b18f8e67cf69021f9ddd224e/docs/chapters/chapter_05.md?plain=1#L154

add another exercise giving them part of a material or a link for a material and asking them to find the ORCID of the material provider. We can give a name and ask them to find so they see if there are more than a person with the same name and use the ORCID to get rid of ambiguity.