Remove hackathon, social outings; add "interactive" tutorials

It is more likely that code-along workshops will be incorporated throughout this year's UGM, rather than a dedicated hackathon. Until funding is confirmed, do not want to specifically promise social outings.

Author: jennaswa

pages/ugm2025.md

@@ -30,10 +30,9 @@ You can expect:
 * Keynote talks from experts in the molecular dynamics simulations space (see [Keynote Speakers](https://www.mdanalysis.org/pages/ugm2025/#Keynote-Speakers) below)
 * Talks related to developing and using MDAnalysis for diverse scientific applications (see [Program](https://www.mdanalysis.org/pages/ugm2025/#Program) below)
 * A focus on recent simulation streaming work being undertaken at ASU
-* Tutorials diving into new features
+* Interactive tutorials diving into new features
 * Direct access to the [MDAnalysis core developer team][coredev] to help shape future development of MDAnalysis
 * Networking opportunities to foster new collaborations
-* A hackathon and other social outings
 
 ## Registration
 In-person attendance will be $100 per attendees, and online attendance will be free; see the registration button below.