Fix registration link format in 2025.md

Author: cmihaigabriel

_editions/2025.md

@@ -14,7 +14,7 @@ scores to also working to achieve deeper understanding about the challenges. For
 about the evaluation procedure.
 
 ##### Workshop registration:
-Workshop registration is now available at [MediaEval 2025 Workshop registration](www.eventbrite.ie/e/mediaeval-2025-tickets-1427931193639)
+Workshop registration is now available at [MediaEval 2025 Workshop registration](https://www.eventbrite.ie/e/mediaeval-2025-tickets-1427931193639)
 
 ##### Registration:
 Signup for MediaEval 2025 is now open via the [MediaEval 2025 registration form](https://forms.gle/y7v1VLP7D9vsbuqv5).