Update readme.md (#22)

Author: Tom Hollander

examples/click-events-filtering/readme.md

@@ -4,7 +4,7 @@
 
 ⚠ _This example uses Beta functionality which is subject to change before the release. You must use the `@beta` tagged version of `@mongodb-js/charts-embed-dom` to use this functionality._
 
-🎮 _[Play with a live demo of this sample here](https://codesandbox.io/s/github/mongodb-js/charts-embed-sdk/tree/master/examples/click-events-basic)_
+🎮 _[Play with a live demo of this sample here](https://codesandbox.io/s/github/mongodb-js/charts-embed-sdk/tree/master/examples/click-events-filtering)_
 
 MongoDB Charts allows you to create visualizations of your MongoDB data using a simple web interface. You can view the visualizations within the Charts UI, or you can use the Embedding feature to render the charts in an external web application.