Update README.md

Author: vladvelici

README.md

@@ -1,3 +1,6 @@
+> [!IMPORTANT]
+> This repository uses the Ably Pub/Sub approach for building chat apps. We now offer Ably Chat—a new family of SDKs and APIs that streamline development and manage realtime chat complexity for you. For a modern, easier way to create chat experiences, visit our [Ably Chat documentation](https://ably.com/docs/chat).
+
 # README
 
 The Ably Chat Component is a WebComponent that demos real-time chat using Ably, right in your browser.
@@ -80,4 +83,4 @@ Once you have **signed up for Ably and have your own API key** you can use the `
 
 If you run npm install and zip/upload the resulting directory (including the `node_modules`) directory to a Lambda + API Gateway, you can be up and running in no time.
 
-The `Lambda Function` in `api/createTokenRequest` expects an environment variable to be configured called **ABLY_API_KEY** with your API key in it.
+The `Lambda Function` in `api/createTokenRequest` expects an environment variable to be configured called **ABLY_API_KEY** with your API key in it.