Update 20230511-sommerfest.md

_events/20230513-sommerfest.md → _events/20230511-sommerfest.md

 ---
 layout: [eventcal]
 title:  "Chaotikum Sommerfest"
-eventdate:   2023-05-13 15:00:00 +0200
-eventend: 2023-05-13 23:59:59 +0200
+eventdate:   2023-05-11 15:00:00 +0200
+eventend: 2023-05-11 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 16772d6e-b36d-48f2-9823-d68582293ace
 contact: vorstand@chaotikum.org