Log Message:
py-matplotlib: update to 3.8.4.

This is the fourth micro release of the 3.8 series.

Highlights of the 3.8.4 release include:

    Enable building against numpy 2.0; released wheels are built against numpy 2
    macosx: Clean up single-shot timers correctly
    Add a draw during show for macos backend
    Fix color sequence data for Set2 and Set3
    gtk: Ensure pending draws are done before GTK draw
    Update "Created with" url in hand.svg
    Avoid modifying user input to Axes.bar
    fix quiver3d incorrect arrow colors