Bump version of python-docs-theme

Author: ZedThree

requirements.txt

@@ -1,7 +1,7 @@
 sphinx==4.5.0
 sphinx-autobuild==0.7.1
 sphinx-inline-tabs==2021.4.11b9
-python-docs-theme==2022.1
+python-docs-theme==2023.9
 sphinx-copybutton==0.5.0
 pypa-docs-theme @ git+https://github.com/pypa/pypa-docs-theme.git
 sphinx-toolbox==3.5.0