Add python versions and downloads badges to readme (#283)

Author: hramezani

README.md

@@ -4,6 +4,8 @@
 [![Coverage](https://codecov.io/gh/pydantic/pydantic-settings/branch/main/graph/badge.svg)](https://codecov.io/gh/pydantic/pydantic-settings)
 [![pypi](https://img.shields.io/pypi/v/pydantic-settings.svg)](https://pypi.python.org/pypi/pydantic-settings)
 [![license](https://img.shields.io/github/license/pydantic/pydantic-settings.svg)](https://github.com/pydantic/pydantic-settings/blob/main/LICENSE)
+[![downloads](https://static.pepy.tech/badge/pydantic-settings/month)](https://pepy.tech/project/pydantic-settings)
+[![versions](https://img.shields.io/pypi/pyversions/pydantic-settings.svg)](https://github.com/pydantic/pydantic-settings)
 
 Settings management using Pydantic, this is the new official home of Pydantic's `BaseSettings`.