Bump pydata-sphinx-theme from 0.13.3 to 0.14.4

Bumps [pydata-sphinx-theme](https://github.com/pydata/pydata-sphinx-theme) from 0.13.3 to 0.14.4.
- [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@v0.13.3...v0.14.4)

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

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

sphinx/requirements.txt

@@ -13,7 +13,7 @@ MarkupSafe==2.1.3
 nbsphinx
 packaging==24.1
 pandoc
-pydata-sphinx-theme==0.13.3
+pydata-sphinx-theme==0.14.4
 Pygments==2.18.0
 pytz==2024.1
 requests==2.32.3