Update task schedule and formatting in memorability.md

Author: cmihaigabriel

_editions/2026/tasks/memorability.md

@@ -124,9 +124,14 @@ accuracy. For Challenge 1.2 (EEG-based detection of recall), submissions will be
 * Iván Martín-Fernández, Manuel Gil Martín, Technical University of Madrid (UPM), Spain;
 * Aashutosh Ganesh, Maastricht University, The Netherlands.
 
-#### Task schedule
-
-The program will be updated with the exact dates.
+##### Task Schedule:
+
+* Registration for task participation opens: January 2026
+* Test data release: 1 March 2026
+* Runs due: 15 May 2026
+* Working notes papers due: 10 June 2026
+* MediaEval 2026 Workshop, Mon.-Tue. 15-16 June 2026, Amsterdam, Netherlands and Online, co-located with ACM ICMR 2026
+* Camera ready deadline: 30 June 2026
 
 #### Acknowledgements