Merge pull request #3404 from Textualize/dependabot/pip/sphinx-rtd-theme-2.0.0

Bump sphinx-rtd-theme from 1.0.0 to 2.0.0

Author: willmcgugan

docs/requirements.txt

@@ -1,5 +1,5 @@
 alabaster==0.7.12
 Sphinx==5.1.1
-sphinx-rtd-theme==1.0.0
+sphinx-rtd-theme==2.0.0
 sphinx-copybutton==0.5.1
 importlib-metadata; python_version < '3.8'