Add Python versions and PyPI badges to Readme (#897)

Author: pseudo-rnd-thoughts

README.md

@@ -1,5 +1,8 @@
-[![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white)](https://pre-commit.com/) [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black) [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.8127025.svg)](https://doi.org/10.5281/zenodo.8127025)
-
+[![Python](https://img.shields.io/pypi/pyversions/gymnasium.svg)](https://badge.fury.io/py/gymnasium)
+[![PyPI](https://badge.fury.io/py/gymnasium.svg)](https://badge.fury.io/py/gymnasium)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.8127025.svg)](https://doi.org/10.5281/zenodo.8127025)
+[![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white)](https://pre-commit.com/)
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
 <p align="center">
     <img src="https://raw.githubusercontent.com/Farama-Foundation/Gymnasium/main/gymnasium-text.png" width="500px"/>