Update matplotlib requirement from ~=3.9.1 to ~=3.9.2 in the major group (#1361)

Updates the requirements on [matplotlib](https://github.com/matplotlib/matplotlib) to permit the latest version.

Updates `matplotlib` to 3.9.2
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](https://github.com/matplotlib/matplotlib/compare/v3.9.1...v3.9.2

)

---
updated-dependencies:
- dependency-name: matplotlib
  dependency-type: direct:development
  dependency-group: major
...
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requirements-dev.txt

@@ -6,4 +6,4 @@ wheel~=0.44.0
 lion-pytorch~=0.2.2
 scipy~=1.14.1
 pandas~=2.2.2
-matplotlib~=3.9.1
+matplotlib~=3.9.2