chore: update security rules to ignore 'exec' in ArchTest

Author: MrPunyapal

tests/Unit/ArchTest.php

@@ -5,7 +5,7 @@
 arch()->preset()->php();
 arch()->preset()->strict();
 arch()->preset()->security()->ignoring([
-    'system',
+    'system', 'exec',
 ]);
 
 arch('controllers')