Update README.md

Author: htczion

README.md

@@ -11,7 +11,7 @@ https://github.com/htczion/ZKMS/wiki
 For HW wallet, SDK will check the compatibility between ROM,SDK and TrustZone. 
 About the details of version number, you can find at section [Compatibility](https://github.com/htczion/ZKMS/wiki#compatibility).  
 
-### ZKMS ver: 3.3.0:   
+### ZKMS ver: 3.3.0:(Developing)   
 
 3.3.0  
     Added getAccountExtPublicKey and getBipExtPublicKey APIs for xPub