adding the 2026 participation fees

Author: angelobanse

content/conference.md

@@ -138,7 +138,15 @@ For SUMO moments:
 
 # Prices
 
-*Coming soon*
+- Regular Ticket: **575 EUR**
+- One-Day Ticket: **350 EUR**
+- Authors and Project Partners: **375 EUR**
+- Students & Invited Guests: **125 EUR** (limited) *
+
+<small>All prices excluding VAT.</small>
+
+*Please contact us via email at [[email protected]](mailto:[email protected]) to request a discount code for student registration.
+The availability is limited.
 
 # Registration