update index

Author: miku

content/_index.md

@@ -6,7 +6,7 @@ draft: false
 We're hosting a [Go](https://go.dev/) [Meetup in
 Leipzig](https://www.meetup.com/de-DE/leipzig-golang/) and have organized over
 50 events so far (eight in [2024](/posts/2024/)).
-Meetup #51 is scheduled for
+[Meetup #51](/posts/meetup-51-invitation/) is scheduled for
 [2025-05-27](https://www.meetup.com/leipzig-golang/events/305626253) 19:00 CET
 at [Gridfuse](https://gridfuse.com) [Leipzig Office](https://www.openstreetmap.org/node/7230218702).