Show workshop team for FOSS4G-EU 2025 in introduction

[justb4]

Concerns: https://github.com/geopython/geopython-workshop/blob/master/workshop/jupyter/content/notebooks/01-introduction.ipynb

[justb4]

I created a branch. You can add yourself:

https://github.com/geopython/geopython-workshop/blob/workshop-team/workshop/jupyter/content/notebooks/01-introduction.ipynb

Think will be @pvgenuchten @ldesousa and @geographika still? Can you add yourselves?

[geographika]

@justb4 I added a commit to the https://github.com/geopython/geopython-workshop/tree/workshop-team branch

[justb4]

Ok, we only need @ldesousa to add himself for now.