Add upstream -docutils patch to fix FTI (bz 2006934).

python-pydata-sphinx-theme-docutils.patch

@@ -0,0 +1,11 @@
+--- a/setup.py	2021-04-26 13:04:47.000000000 -0600
++++ b/setup.py	2021-09-22 16:24:01.861130666 -0600
+@@ -48,7 +48,7 @@ setup(
+     include_package_data=True,
+     # See http://www.sphinx-doc.org/en/stable/theming.html#distribute-your-theme-as-a-python-package
+     entry_points={"sphinx.html_themes": ["pydata_sphinx_theme = pydata_sphinx_theme"]},
+-    install_requires=["sphinx", "beautifulsoup4", "docutils<0.17"],
++    install_requires=["sphinx", "beautifulsoup4", "docutils!=0.17.0"],
+     extras_require={
+         "test": tests_require,
+         "coverage": ["pytest-cov", "codecov", *tests_require],