Merge pull request #614 from EESSI/update-training-page

Move CI/CD Hackathon to past events

Author: bedroge

docs/training-events/index.md

@@ -2,11 +2,11 @@
 
 ## Upcoming events (2025)
 
-* [*EESSI CI/CD Hackathon*](2025/hackathon-eurohpc-user-days.md) (hybrid event, 2 October 2025)
-
 * [*EESSI happy hour sessions*](2025/happy-hours-sessions.md) (online sessions **every** Monday,  starting 18 August 2025)
 
 ### Past events (2025)
 
+* [*EESSI CI/CD Hackathon*](2025/hackathon-eurohpc-user-days.md) (hybrid event, 2 October 2025)
+
 * [*EESSI webinar series (May-June 2025)*](2025/webinar-series-2025Q2.md) (online tutorials, 5/12/19/26 May & 2 June)