Update dependency matplotlib to v3.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
matplotlib (source)	==3.8.3 -> ==3.9.0

---

Release Notes

matplotlib/matplotlib (matplotlib)

v3.9.0

Compare Source

v3.8.4: REL: v3.8.4

Compare Source

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

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.