Update README.md

Author: amandeepmittal

README.md

@@ -27,7 +27,7 @@ You may find some of the examples being outdated in time, in terms of framework
 
 This example uses:
 
-- Expo SDK 46
+- Expo SDK 48
 
 <img src="https://i.imgur.com/LDyiXIu.gif" width="200"/>