docs: fix pypi badge

Author: tngraf

Readme.md

@@ -2,7 +2,7 @@
 
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/sw360/sw360python/blob/master/License.md)
 [![Python Version](https://img.shields.io/badge/python-3.7%2C3.8%2C3.9-yellow?logo=python)](https://www.python.org/doc/versions/)
-[![PyPI version](https://badge.fury.io/py/sw360.svg)](https://pypi.org/project/sw360/)
+[![PyPI version](https://img.shields.io/badge/pypi%20package-1.2.1-green)](https://pypi.org/project/sw360/)
 [![Static checks](https://github.com/sw360/sw360python/actions/workflows/python-package.yml/badge.svg)](https://github.com/sw360/sw360python/actions/workflows/python-package.yml)
 [![Unit tests](https://github.com/sw360/sw360python/actions/workflows/unit-test.yml/badge.svg)](https://github.com/sw360/sw360python/actions/workflows/unit-test.yml)