Update conferences.md - React Miami (#5704)

Author: michellebakels

beta/src/content/community/conferences.md

@@ -10,6 +10,11 @@ Do you know of a local React.js conference? Add it here! (Please keep the list c
 
 ## Upcoming Conferences {/*upcoming-conferences*/}
 
+### React Miami 2023 {/*react-miami-2023*/}
+April 20 - 21, 2023. Miami, FL, USA
+
+[Website](https://www.reactmiami.com/) - [Twitter](https://twitter.com/ReactMiamiConf)
+
 ### Reactathon 2023 {/*reactathon-2023*/}
 May 2 - 3, 2023. San Francisco, CA, USA