Update callForStudents2025.pillar: fix students adress

- Created the  [email protected] list on inria sympa
- this PR fixes the year

fixes #357

Edit

Author: MarcusDenker

2025-Conference/callForStudents2025.pillar

@@ -10,7 +10,7 @@ Student volunteers help the conference run smoothly; in return, they have free a
 
 !! Conference details:
 
-Send an email to volunteers-esug24@inria.fr.
+Send an email to volunteers-esug25@inria.fr.
 
 - title: [ESUG 2025 Student]
 - name, gender, university/school, country, email address