Bump matplotlib from 3.9.3 to 3.9.4 (#744)

Bumps [matplotlib](https://github.com/matplotlib/matplotlib) from 3.9.3 to 3.9.4.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.9.3...v3.9.4)

---
updated-dependencies:
- dependency-name: matplotlib
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pyproject.toml

@@ -54,7 +54,7 @@ strict = [
     "FireWorks==2.0.4",
     "PyYAML==6.0.2",
     "maggma==0.71.4",
-    "matplotlib==3.9.3",
+    "matplotlib==3.9.4",
     "monty==2025.1.9",
     "moto==4.2.13",
     "networkx==3.2.1",