Bump pydata-sphinx-theme from 0.11.0 to 0.15.2 (#225)

Bumps [pydata-sphinx-theme](https://github.com/pydata/pydata-sphinx-theme) from 0.11.0 to 0.15.2.
- [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@v0.11.0...v0.15.2)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements_docs.txt

@@ -14,7 +14,7 @@ mypy==0.982
 mypy-extensions==1.0.0
 numpydoc==1.5.0
 osmnx==1.2.2
-pydata-sphinx-theme==0.11.0
+pydata-sphinx-theme==0.15.2
 pypandoc==1.10
 pytest-sphinx==0.5.0
 pyvista==0.42.3