[Doc]: Invert Axes example sets x-lims directly

[rcomer]

Documentation Link

https://matplotlib.org/devdocs/gallery/subplots_axes_and_figures/invert_axes.html

Problem

This example shows how to invert the x-axis by using ax.set_xlim. I would have expected it to use the set_inverted method on the x-axis: that is more flexible as it doesn't prevent autoscaling on subsequent calls.

I note that this example pre-dates the addition of set_inverted to the library.

Suggested improvement

Either change the existing code to use set_inverted or add a second figure within the example to show its use.