Update demo link in README file (#609)

Author: wwilkowski

handpose/README.md

@@ -9,7 +9,7 @@ Given an input, the model predicts whether it contains a hand. If so, the model
 
 More background information about the model, as well as its performance characteristics on different datasets, can be found here: [https://drive.google.com/file/d/1sv4sSb9BSNVZhLzxXJ0jBv9DqD-4jnAz/view](https://drive.google.com/file/d/1sv4sSb9BSNVZhLzxXJ0jBv9DqD-4jnAz/view)
 
-Check out our [demo](https://storage.googleapis.com/tfjs-models/demos/handpose/index.html), which uses the model to detect hand landmarks in a live video stream.
+Check out our [demo](https://storage.googleapis.com/tfjs-models/demos/handtrack/index.html), which uses the model to detect hand landmarks in a live video stream.
 
 This model is also available as part of [MediaPipe](https://hand.mediapipe.dev/), a framework for building multimodal applied ML pipelines.