update readme with worflow badge

Author: mohanrajpac

.github/workflows/php.yml

@@ -1,4 +1,4 @@
-name: PHP
+name: PHP lint & test
 
 on: [push, pull_request]
 

README.md

@@ -1,6 +1,7 @@
 # CoverageBadge
 
-![](./badges/php.svg)
+[![PHP lint & test](https://github.com/codebtech/coveragebadge/actions/workflows/php.yml/badge.svg)](https://github.com/codebtech/coveragebadge/actions/workflows/php.yml) ![](./badges/php.svg)
+
 
 CoverageBadge is a PHP library for creating SVG coverage badges from Clover XML files.