Update in-development notice

Signed-off-by: Vui Lam <[email protected]>

README.md

@@ -2,9 +2,10 @@
 
 [![Tanzu Core CLI Tests](https://github.com/vmware-tanzu/tanzu-cli/actions/workflows/cli_core_e2e_test.yaml/badge.svg?branch=main&event=push)](https://github.com/vmware-tanzu/tanzu-cli/actions/workflows/cli_core_e2e_test.yaml?query=event:push+branch:main)
 
-:warning: NOTE: This repository is still under early development. We plan to
-make releases available for evaluation in the second quarter of 2023. Please
-watch this page for further updates.
+_NOTE: The first alpha release is available for evaluation, but it still needs
+to be complemented by a plugin repository accessible to the CLI. Please watch
+this page for further updates as we work towards our first official release in
+the second quarter of 2023._
 
 ## Overview