Update onetimes.yml

Add the hackathon in Dresden

Signed-off-by: Friederike <[email protected]>

onetimes.yml

@@ -201,3 +201,10 @@ events:
       Dial-In: +49-221-292772-611
       Coordinator: Jan Schoone <schoone[at]osb-alliance.com>
     location: "https://conf.scs.koeln:8443/SCS-Tech"
+ - summary: "SCS Hackathon #3"
+    begin: 2023-11-08 10:00:00
+    duration:
+      minutes: 480
+    description: We meet as community to develop, think, collect, and hack together. Details follow soon.
+      Coordinator: Friederike Zelke <zelke[at]osb-alliance.com>
+    location: "Cloud%Heat, Halle 15, Königsbrücker Straße 96, 01099 Dresden, Germany"