[docs] Link to pypistats.org page from downloads badge

README.md

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 # deepali
 
-[![doi](https://zenodo.org/badge/DOI/10.5281/zenodo.8170161.svg)](https://doi.org/10.5281/zenodo.8170161) [![pypi](https://img.shields.io/pypi/v/hf-deepali)](https://pypi.org/project/hf-deepali/) ![downloads](https://img.shields.io/pypi/dm/hf-deepali) [![docs](https://github.com/BioMedIA/deepali/actions/workflows/docs.yml/badge.svg)](https://github.com/BioMedIA/deepali/actions/workflows/docs.yml) [![tests](https://github.com/BioMedIA/deepali/actions/workflows/tests.yml/badge.svg)](https://github.com/BioMedIA/deepali/actions/workflows/tests.yml) [![release](https://github.com/BioMedIA/deepali/actions/workflows/release.yml/badge.svg)](https://github.com/BioMedIA/deepali/actions/workflows/release.yml)
+[![doi](https://zenodo.org/badge/DOI/10.5281/zenodo.8170161.svg)](https://doi.org/10.5281/zenodo.8170161) [![pypi](https://img.shields.io/pypi/v/hf-deepali)](https://pypi.org/project/hf-deepali/) [![downloads](https://img.shields.io/pypi/dm/hf-deepali)](https://pypistats.org/packages/hf-deepali) [![docs](https://github.com/BioMedIA/deepali/actions/workflows/docs.yml/badge.svg)](https://github.com/BioMedIA/deepali/actions/workflows/docs.yml) [![tests](https://github.com/BioMedIA/deepali/actions/workflows/tests.yml/badge.svg)](https://github.com/BioMedIA/deepali/actions/workflows/tests.yml) [![release](https://github.com/BioMedIA/deepali/actions/workflows/release.yml/badge.svg)](https://github.com/BioMedIA/deepali/actions/workflows/release.yml)
 
 An [open source](https://github.com/BioMedIA/deepali/tree/main/LICENSE) research library for image, point set, and surface registration in [PyTorch], which is developed and maintained by the [HeartFlow-Imperial College London] research lab at the [Biomedical Image Analysis Group].