Add Test Coverage badge to README.md

README.md

@@ -1,5 +1,7 @@
 ![Test Suite](https://github.com/OpenLEADR/openleadr-python/workflows/Test%20Suite/badge.svg)
- ![PyPI Downloads](https://img.shields.io/pypi/dm/openleadr?color=lightblue&label=PyPI%20Downloads) [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/4317/badge)](https://bestpractices.coreinfrastructure.org/projects/4317)
+ [![Test Coverage](https://openleadr.org/coverage/badge.svg)](https://openleadr.org/coverage)
+ ![PyPI Downloads](https://img.shields.io/pypi/dm/openleadr?color=lightblue&label=PyPI%20Downloads)
+ [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/4317/badge)](https://bestpractices.coreinfrastructure.org/projects/4317)
 
 ![OpenLEADR](logo.png)