update Readme

Author: elwafa

README.md

@@ -40,6 +40,7 @@ composer install
 touch test.php
 ```
 ```php
+// test.php
 <?php
 require 'vendor/autoload.php';
 
@@ -108,6 +109,10 @@ echo "Success Rate: " . $result->getSuccessRate() . "%\n";
 echo "Average Response Time: " . $result->getAvgResponseTime() . "\n";
 ```
 
+```bash
+php test.php
+```
+
 ## Features
 
 - Cross-platform support (Windows, Linux, MacOS)