Bump matplotlib from 3.5.1 to 3.9.1.post1

Bumps [matplotlib](https://github.com/matplotlib/matplotlib) from 3.5.1 to 3.9.1.post1.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.5.1...v3.9.1.post1)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 # analysis
-matplotlib==3.5.1
+matplotlib==3.9.1.post1
 numpy==1.22.3
 pandas==1.4.2
 PyYAML==6.0