Update change log

Author: DonJayamanne

CHANGELOG.md

@@ -4,6 +4,8 @@
 * Excellent support for [arquero](https://uwdata.github.io/arquero/) (rich HTML output)
 * New notebooks default cells to `typescript`
 * Displaying cell execution errors on Linux
+* Display `Tensorflow Visualization` panel only when required.
+* Ability to always hide `Tensorflow Visualization` panel via the setting `"node_notebook.disableTensorflowVis": true`
 
 ## 2.0.1 (2 Sept 2021)
 * Updated readme