CI: (deps): Bump matplotlib from 3.8.4 to 3.9.1 in /ci

[dependabot[bot]]

Bumps matplotlib from 3.8.4 to 3.9.1.

Release notes

Sourced from matplotlib's releases.

REL: 3.9.1

This is the first bugfix release of the 3.9.x series.

This release contains several bug-fixes and adjustments:

• Add GitHub artifact attestations for sdist and wheels
• Re-add matplotlib.cm.get_cmap; note this function will still be removed at a later date
• Allow duplicate backend entry points
• Fix Axes autoscaling of thin bars at large locations
• Fix Axes autoscaling with axhspan / axvspan
• Fix Axes3D autoscaling of Line3DCollection / Poly3DCollection
• Fix Axes3D mouse interactivity with non-default roll angle
• Fix box aspect ratios in Axes3D with alternate vertical axis
• Fix case handling of backends specified as module://...
• Fix crash with TkAgg on Windows with tk.window_focus: True
• Fix interactive update of SubFigures
• Fix interactivity when using the IPython console
• Fix pickling of AxesWidgets and SubFigures
• Fix scaling on GTK3Cairo / GTK4Cairo backends
• Fix text wrapping within SubFigures
• Promote mpltype Sphinx role to a public extension; note this is only intended for development reasons

REL: 3.9.0

Highlights of this release include:

• Plotting and Annotation improvements
  • Axes.inset_axes is no longer experimental
  • Legend support for Boxplot
  • Percent sign in pie labels auto-escaped with usetex=True
  • hatch parameter for stackplot
  • Add option to plot only one half of violin plot
  • axhline and axhspan on polar axes
  • Subplot titles can now be automatically aligned
  • axisartist can now be used together with standard Formatters
  • Toggle minorticks on Axis
  • StrMethodFormatter now respects axes.unicode_minus
• Figure, Axes, and Legend Layout
  • Subfigures now have controllable zorders
  • Getters for xmargin, ymargin and zmargin
• Mathtext improvements
  • mathtext documentation improvements
  • mathtext spacing corrections
• Widget Improvements
  • Check and Radio Button widgets support clearing
• 3D plotting improvements
  • Setting 3D axis limits now set the limits exactly
• Other improvements
  • New BackendRegistry for plotting backends
  • Add widths, heights and angles setter to EllipseCollection
  • image.interpolation_stage rcParam

... (truncated)

Commits

• 44be14c REL: 3.9.1
• 5325425 DOC: Create release notes for 3.9.1
• 568a039 Merge pull request #28507 from meeseeksmachine/auto-backport-of-pr-28430-on-v...
• 7fa9f24 Merge pull request #28506 from meeseeksmachine/auto-backport-of-pr-28451-on-v...
• 06189c2 Backport PR #28430: Fix pickling of AxesWidgets.
• c43313a Backport PR #28451: Fix GTK cairo backends
• 560fdc4 Merge pull request #28499 from meeseeksmachine/auto-backport-of-pr-28498-on-v...
• 5552302 Backport PR #28498: Don't fail if we can't query system fonts on macOS
• f76bba4 Merge pull request #28491 from meeseeksmachine/auto-backport-of-pr-28487-on-v...
• 8ccd2ee Merge pull request #28490 from meeseeksmachine/auto-backport-of-pr-28486-on-v...
• Additional commits viewable in compare view

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