Remove mention of public beta from the README (#4052)

Author: mattseddon

README.md

@@ -34,8 +34,8 @@ databases are required.
 - **Data Management**: Handle and version large datasets, files, and models
   effectively right from VS Code.
 
-> **Note**: We are in public beta and welcome early adopter feedback!  
-> Feel free to reach out [via Discord] or open [issues in GitHub].
+> **Note**: We always welcome feedback! Feel free to reach out [via Discord] or
+> open [issues in GitHub].
 >
 > [issues in github]: https://github.com/iterative/vscode-dvc/issues
 > [via discord]: https://discord.gg/BGCjJHvDHt