Bump pymatviz from 0.4.4 to 0.8.1

Bumps [pymatviz](https://github.com/janosh/pymatviz) from 0.4.4 to 0.8.1.
- [Release notes](https://github.com/janosh/pymatviz/releases)
- [Changelog](https://github.com/janosh/pymatviz/blob/main/changelog.md)
- [Commits](janosh/pymatviz@v0.4.4...v0.8.1)

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

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

requirements-docs.txt

@@ -2,4 +2,4 @@ mkdocs-material==9.5.4
 plotly==5.18.0
 mkdocstrings==0.24.0
 mkdocstrings-python==1.8.0
-pymatviz==0.4.4
+pymatviz==0.8.1