Warnings with matplotlib 3.7.2

[wch]

When running the penguins app with the latest version of matplotlib, 3.7.2, it raises the following warnings:

$ shiny run examples/penguins/app.py 
...
/Users/winston/Projects/py-shiny/shiny/render/_try_render_plot.py:47: UserWarning: The figure layout has changed to tight
  plt.tight_layout()  # pyright: ignore[reportUnknownMemberType]

The warning does not occur with 3.7.1.

Looking at the matplotlib 3.7.2 release notes, it might have something to do with this?
matplotlib/matplotlib#25624

[wch]

This seems to happen with the Penguins app only when marginal plots are enabled.

[gshotwell]

Any objection to just squashing the warning?

[tacaswell]

I think this is a regression it Matplotlib between 3.7.1 and 3.7.2.

[wch]

@tacaswell Thanks for finding the bug, and weighing in here.

[tacaswell]

You should note I also put the bug in 🐑 .

[gshotwell]

Closed via #615