doc: Add link for Berlin meetup group
@@ -2263,6 +2263,7 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
## Meetups
* [Basel Go Meetup](https://www.meetup.com/Basel-Go-Meetup/)
+* [Berlin Golang](https://www.meetup.com/golang-users-berlin/)
* [Brisbane Gophers](https://www.meetup.com/Brisbane-Golang-Meetup/)
* [Canberra Gophers](https://www.meetup.com/Canberra-Gophers/)
* [Go Language NYC](https://www.meetup.com/golanguagenewyork/)
