Added Nodeschool Passau meetup (#2013)

Hi all,
I just wanted to add our Nodeschool Passau meetup to the list.

Thanks,
Valentin

Author: huberv

locale/en/get-involved/node-meetups.md

@@ -82,3 +82,15 @@ REQUIREMENTS
 - How to submit a talk? DM @obensource on twitter
 - Organizer name - Ben Michel
 - Organizer contact info - [@obensource](https://www.twitter.com/obensource/)
+
+### Germany
+
+#### Bavaria
+
+##### Passau
+
+- [Meetup](https://www.meetup.com/de-DE/Nodeschool-Passau/)
+- Frequency of meetups - quarterly
+- How to submit a talk? Email [Valentin](mailto:[email protected])
+- Organizer name - Valentin Huber
+- Organizer contact info - [Email](mailto:[email protected])