doc: update badge info

Author: xuyxu

README.rst

@@ -1,21 +1,18 @@
 .. image:: ./docs/_images/badge_small.png
 
-|github|_ |readthedocs|_ |codecov|_ |python|_ |pypi|_ |license|_
+|github|_ |readthedocs|_ |codecov|_ |python|_ |license|_
 
 .. |github| image:: https://github.com/TorchEnsemble-Community/Ensemble-Pytorch/workflows/torchensemble-CI/badge.svg
 .. _github: https://github.com/TorchEnsemble-Community/Ensemble-Pytorch/actions
 
 .. |readthedocs| image:: https://readthedocs.org/projects/ensemble-pytorch/badge/?version=latest
 .. _readthedocs: https://ensemble-pytorch.readthedocs.io/en/latest/index.html
 
-.. |codecov| image:: https://codecov.io/gh/xuyxu/Ensemble-Pytorch/branch/master/graph/badge.svg?token=2FXCFRIDTV
-.. _codecov: https://codecov.io/gh/xuyxu/Ensemble-Pytorch
+.. |codecov| image:: https://codecov.io/gh/TorchEnsemble-Community/Ensemble-Pytorch/branch/master/graph/badge.svg?token=2FXCFRIDTV
+.. _codecov: https://codecov.io/gh/TorchEnsemble-Community/Ensemble-Pytorch
 
-.. |python| image:: https://img.shields.io/badge/python-3.6+-blue?logo=python
-.. _python: https://www.python.org/
-
-.. |pypi| image:: https://img.shields.io/pypi/v/torchensemble
-.. _pypi: https://pypi.org/project/torchensemble/
+.. |python| image:: https://img.shields.io/pypi/pyversions/torchensemble
+.. _python: https://pypi.org/project/torchensemble/
 
 .. |license| image:: https://img.shields.io/github/license/TorchEnsemble-Community/Ensemble-Pytorch
 .. _license: https://github.com/TorchEnsemble-Community/Ensemble-Pytorch/blob/master/LICENSE