Update PyTorch Sphinx theme version (#3635)

Fixes top nav and other issues.

Author: svekars

.ci/docker/requirements.txt

@@ -16,7 +16,7 @@ pandocfilters==1.5.1
 markdown==3.8.2
 
 # PyTorch Theme
-git+https://github.com/pytorch/pytorch_sphinx_theme.git@bbe196cbc5037d69d89ad1bf079e2afa3b3e9611#egg=pytorch_sphinx_theme2
+pytorch_sphinx_theme2==0.2.0
 
 # Tutorial dependencies
 tqdm==4.66.1