Bump matplotlib from 3.8.3 to 3.8.4 in /requirements (#1984)

Bumps [matplotlib](https://github.com/matplotlib/matplotlib) from 3.8.3 to 3.8.4.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.8.3...v3.8.4)

---
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>

requirements/required.txt

@@ -7,7 +7,7 @@ fiona==1.9.6
 kornia==0.7.2
 lightly==1.5.2
 lightning[pytorch-extra]==2.2.1
-matplotlib==3.8.3
+matplotlib==3.8.4
 numpy==1.26.4
 pandas==2.2.1
 pillow==10.3.0