refactor(rename): rename deprecation message

Author: ehdsouza

README.md

@@ -36,7 +36,7 @@ Python client library to quickly get started with the various [Watson APIs][wdc]
 * You need an [IBM Cloud][ibm-cloud-onboarding] account.
 
 ## Installation
-Note: We are renaming `watson-developer-cloud` to `ibm-watson`
+Note: We are moving to `ibm-watson`. All versions prior to v3.0.0 can still be found in `watson-developer-cloud`
 
 To install, use `pip` or `easy_install`: