Add React Fwdays conference (#3537)

* Add React Fwdays conference

* Update conferences.md

Co-authored-by: Alexey Pyltsyn <[email protected]>

Author: amahomet

content/community/conferences.md

@@ -12,6 +12,11 @@ Do you know of a local React.js conference? Add it here! (Please keep the list c
 
 ## Upcoming Conferences {#upcoming-conferences}
 
+### React fwdays’21 {#react-fwdays-2021}
+March 27, 2021 - remote event
+
+[Website](https://fwdays.com/en/event/react-fwdays-2021) - [Twitter](https://twitter.com/fwdays) - [Facebook](https://www.facebook.com/events/1133828147054286) - [LinkedIn](https://www.linkedin.com/events/reactfwdays-21onlineconference6758046347334582273) - [Meetup](https://www.meetup.com/ru-RU/Fwdays/events/275764431/)
+
 ### React Next 2020 {#react-next-2020}
 December 1-2, 2020 - remote event