Add Flutter Nantes meetup

Author: patou

source.md

@@ -789,7 +789,7 @@ This section contains libraries that take an experimental or unorthodox approach
 
 ### 🇫🇷 France
 
-- Meetup [Bordeaux](https://www.meetup.com/fr-FR/Flutter-Bordeaux) - [Lille](https://www.meetup.com/fr-FR/Flutter-Lille) - [Paris](https://www.meetup.com/fr-FR/Flutter-Paris) - [Rennes](https://www.meetup.com/fr-FR/Flutter-Rennes)
+- Meetup [Bordeaux](https://www.meetup.com/fr-FR/Flutter-Bordeaux) - [Lille](https://www.meetup.com/fr-FR/Flutter-Lille) - [Paris](https://www.meetup.com/fr-FR/Flutter-Paris) - [Rennes](https://www.meetup.com/fr-FR/Flutter-Rennes) - [Nantes](https://www.meetup.com/fr-FR/flutter-nantes/)
 - [Twitter](https://twitter.com/FlutterFrance)
 - [Slack](https://linktr.ee/flutter_france)
 - [Newsletter Flutter Digest](https://www.flutter-digest.com/)