Changed the time from 6 pm to 5 pm in index.md

Author: sunito

index.md

@@ -2,7 +2,7 @@
 
 ## Upcoming events
 
-Our next meetup will be on **June 11th, 2026** at 6 pm.     
+Our next meetup will be on **June 11th, 2026** at 5 pm.     
 
 If you are interested in joining, please say so on [Zulip](https://julialang.zulipchat.com/#narrow/stream/249782-berlinusergroup").