Merge pull request #333 from ESUG/MarcusDenker-patch-3

Update index.pillar: add link to slides

index.pillar

@@ -21,6 +21,8 @@ The European Smalltalk User Group (ESUG) is a non-profit user organization that
 - *International Workshop of Smalltalk Technolgies (IWST) Program>/2024-Conference/agenda-workshop.html*
 - *Innovation Technology Awards Submissions & Winners>2024-Conference/awardsSubmissions.pillar*
 - *Camp Smalltalk>2024-Conference/camp2024.pillar*
+- Slides in the *ESUG Archive>http://archive.esug.org/ESUG2024/*
+
 
 News: Be ready for the concert *Riding the Mooflod>2024-Conference/Concert.pillar*, a ""Live Coding Musical Performance by DJ Lucretio""
 
@@ -32,7 +34,7 @@ News: Be ready for the concert *Riding the Mooflod>2024-Conference/Concert.pilla
 ESUG 2023 Lyon, France from 26 August. - 1 Sept 2023.
 - *ESUG 23 > 2023-Conference/conf2023.pillar* - Check the *program>https://esug.github.io/2023-Conference/agenda.html*.
 - *International workshop on Smalltalk Technologies (IWST 2023) > 2023-Conference/conf2023.pillar*.
-- Slides in the *ESUG Archive>http://old.esug.org/data/ESUG2023/*
+- Slides in the *ESUG Archive>http://archive.esug.org/ESUG2023/*
 - Slides on *Slideshare>https://www.slideshare.net/esug/presentations*
 
 !!!! ESUG 2022