Update tomas-merva.md

tomas now doesn't appear at all, so changing it back for now

_people/tomas-merva.md

@@ -3,7 +3,7 @@ name: Tomas Merva
 title: PhD visitor # The title that shows below your name.
 type: phd-visitor # phd-candidate, post-doc, phd-visitor, professor, engineer
 joined_date: 2024-02-01
-#left_date: 2024-09-30 # Optional, if you add a left date the member will be moved to the past members section
+left_date: 2024-09-30 # Optional, if you add a left date the member will be moved to the past members section
 # image: /assets/images/people/Brito_Bruno.jpg # link or path in /assets/...
 links: # Optional, links to other stuff
     - name: LinkedIn