Bump pydata-sphinx-theme from 0.13.3 to 0.14.1

Bumps [pydata-sphinx-theme](https://github.com/pydata/pydata-sphinx-theme) from 0.13.3 to 0.14.1.
- [Release notes](https://github.com/pydata/pydata-sphinx-theme/releases)
- [Commits](https://github.com/pydata/pydata-sphinx-theme/compare/v0.13.3...v0.14.1)

docs/requirements.txt

@@ -11,4 +11,4 @@ jupyter-sphinx==0.4.0
 sphinx_autodoc_typehints==1.23
 sphinx-tabs==3.4.1
 sphinx-design==0.5.0
-pydata-sphinx-theme==0.13.3
+pydata-sphinx-theme==0.14.1