Bump matplotlib from 3.9.1 to 3.9.1.post1

Bumps [matplotlib](https://github.com/matplotlib/matplotlib) from 3.9.1 to 3.9.1.post1.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.9.1...v3.9.1.post1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -2,7 +2,7 @@
 xarray==2024.3.0
 pandas==2.2.2
 numpy==1.26.4
-matplotlib==3.9.1
+matplotlib==3.9.1.post1
 dask[array, distributed]==2024.7.1
 requests==2.32.3
 statsmodels==0.14.2