Fix pytest versions in package README

Author: ramosbugs

src/pytest_unflakable/README.md

@@ -23,7 +23,7 @@ for running `unittest` tests.
 This plugin maintains compatibility with the PyTest and Python versions listed below:
 
 ![Python versions](https://img.shields.io/pypi/pyversions/pytest-unflakable)
-![PyTest versions](https://img.shields.io/badge/pytest-6.2%20%7C%207.0%20%7C%207.1-blue)
+![PyTest versions](https://img.shields.io/badge/pytest-6.2%20%7C%207.0%20%7C%207.1%20%7C%207.2-blue)
 
 ## Contributing