Merge branch 'update-staff-pages' into 'main'

updated-more-tas

See merge request !11

_staffers/_berend.md

+---
+name: Berend Bouvy
+role: Teaching Assistant
+email: b.n.bouvy@student.tudelft.nl
+photo: berend.jpg
+---
+
+Civil Engineering / Geoscience & Remote Sensing / Econometrics
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_staffers/_renat.md

+name: Renat Piscorschi
+role: Instructor
+email: R.Piscorschi@student.tudelft.nl
+photo: Renat.jpg

_staffers/daniel.md

+name: Daniel van der Hoorn
+role: Teaching Assistant
+email: D.J.vanderhoorn@student.tudelft.nl
+photo: Daniel.jpg
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