Add release status badge to homepage

Author: zachborboa

www/index.php

@@ -192,6 +192,11 @@
             alt=""
             src="https://img.shields.io/github/workflow/status/php-curl-class/php-curl-class/ci?style=flat-square" />
     </a>
+    <a href="https://github.com/php-curl-class/php-curl-class/releases/">
+        <img
+            alt=""
+            src="https://img.shields.io/github/workflow/status/php-curl-class/php-curl-class/release?style=flat-square&label=release" />
+    </a>
     <a href="https://github.com/php-curl-class/php-curl-class/releases/">
         <img
             alt=""