chore(deps): bump pydata-sphinx-theme from 0.16.1 to 0.19.0 in /docs

Bumps [pydata-sphinx-theme](https://github.com/pydata/pydata-sphinx-theme) from 0.16.1 to 0.19.0.
- [Release notes](https://github.com/pydata/pydata-sphinx-theme/releases)
- [Changelog](https://github.com/pydata/pydata-sphinx-theme/blob/main/RELEASE.md)
- [Commits](pydata/pydata-sphinx-theme@v0.16.1...v0.19.0)

---
updated-dependencies:
- dependency-name: pydata-sphinx-theme
  dependency-version: 0.19.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docs/requirements.txt

@@ -17,7 +17,7 @@
 
 sphinx==8.2.3
 sphinx-reredirects==1.0.0
-pydata-sphinx-theme==0.16.1
+pydata-sphinx-theme==0.19.0
 myst-parser==4.0.1
 maturin==1.10.2
 jinja2==3.1.6