Change Local PHP Security Checker to composer audit

As https://github.com/fabpot/local-php-security-checker repository is archived and recommends using composer audit.

Author: ri

_posts/04-02-01-Composer-and-Packagist.md

@@ -86,7 +86,7 @@ that can monitor dependencies and send you alerts on updates.
 
 ### Checking your dependencies for security issues
 
-The [Local PHP Security Checker] is a command-line tool, which will examine your `composer.lock`
+Runnning `composer audit` command will examine your `composer.lock`
 file and tell you if you need to update any of your dependencies.
 
 ### Handling global dependencies with Composer