Streamz example on home page not working

hvplot=0.8.1, streamz=0.6.4

I was trying out the Streamz example on the homepage https://hvplot.holoviz.org/index.html.

Its not working


And I believe the code could never correspond to what is in the image, which I would expect as a user.


```python
import hvplot.streamz # noqa
from streamz.dataframe import Random

df_streamz = Random(interval='200ms', freq='50ms')
df_streamz.hvplot()
```