add anywidget update

Author: LiamConnors

Diff for: doc/python/v6-changes.md

@@ -45,6 +45,11 @@ Versions of Jupyter Notebook earlier than version 7 are no longer supported. To
 pip install notebook --upgrade
 ```
 
+## Change to anywidget for go.FigureWidget
+
+[go.FigureWidget](https://plotly.com/python/figurewidget/) now uses [anywidget](https://anywidget.dev/). Install `anywidget` to 
+
+
 ## Processing NumPy and Pandas Series
 
 Plotly.py now takes advantage of recent changes in how Plotly.js handles typed arrays for improved performance. See the [performance page](python/performance/) for more details.
@@ -124,4 +129,4 @@ The `pointcloud` trace has been removed. Use [`scattergl`](/python/reference/sca
 
 ### Transforms
 
-Transforms, which were deprecated in Plotly.py v5, have been removed.
+Transforms, which were deprecated in Plotly.py v5, have been removed.