Fix interactive Plotly figures by specifying ipywidgets version (#1273)

Summary:
Context:

Interactive figures on the website have not been displaying properly:

![image](https://user-images.githubusercontent.com/9137425/203114657-fb06925d-d798-483f-9be6-c300357cf955.png)

This happens because the newest version of Plotly is not compatible with the newest version if its dependency ipywidgets, which is needed for interactive figures: plotly/plotly.py#3686

So we can fix this by specifying the ipywidgets version.

Pull Request resolved: #1273

Test Plan:
- Reproduced the error with latest Ax + latest boTorch on my Mac
- Then it went away when I re-built with the specified ipywidgets version

Reviewed By: bernardbeckerman

Differential Revision: D41438932

Pulled By: esantorella

fbshipit-source-id: f6b2f430da1483a4613dac8f81a76dbc6f6dd4cb

Author: esantorella

setup.py

@@ -25,6 +25,9 @@
     "pandas",
     "scipy",
     "scikit-learn",
+    # ipywidgets 8.0.0 is incompatible with Plotly >=5.7.0
+    # https://github.com/plotly/plotly.py/issues/3686
+    "ipywidgets<8.0.0",
     "plotly",
     "typeguard",
 ]