Fix RtD formatting

docs/requirements.txt

@@ -36,7 +36,7 @@ pytest-cov>=2.4
 # pytorch-lightning 1.3+ required for gradient_clip_algorithm argument to Trainer
 pytorch-lightning>=1.3
 # release versions missing files, must install from master
-git+https://github.com/pytorch/pytorch_sphinx_theme#egg=pytorch_sphinx_theme
+-e git+https://github.com/pytorch/pytorch_sphinx_theme#egg=pytorch_sphinx_theme
 # radiant-mlhub 0.2.1+ required for api_key bugfix:
 # https://github.com/radiantearth/radiant-mlhub/pull/48
 radiant-mlhub>=0.2.1