Add downloads badge (#10)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>

Author: glenn-jocher

README.md

@@ -11,6 +11,7 @@
 Install the `ultralytics-autoimport` package from PyPI:
 
 [![PyPI - Version](https://img.shields.io/pypi/v/ultralytics-autoimport.svg)](https://pypi.org/project/ultralytics-autoimport/)
+[![Downloads](https://static.pepy.tech/badge/ultralytics-autoimport)](https://www.pepy.tech/projects/ultralytics-autoimport)
 [![PyPI - Python Version](https://img.shields.io/pypi/pyversions/ultralytics-autoimport.svg)](https://pypi.org/project/ultralytics-autoimport/)
 
 ```bash