Update PyTorch Sphinx theme version

Author: svekars

.ci/docker/requirements.txt

@@ -16,7 +16,7 @@ pandocfilters==1.5.1
 markdown==3.8.2
 
 # PyTorch Theme
--e git+https://github.com/pytorch/pytorch_sphinx_theme.git@b39e3e1e800132815a6187bf4f7bf545a2e9d8a9#egg=pytorch_sphinx_theme2
+-e git+https://github.com/pytorch/pytorch_sphinx_theme.git@e0cbfaf789a51899859f2c7626e0ad3a78ad4c2e#egg=pytorch_sphinx_theme2
 
 # Tutorial dependencies
 tqdm==4.66.1