change static to self

src/Potter/Environment/Behaviour.php

@@ -16,7 +16,7 @@ trait Behaviour
     
     private static function addEnvironmentBehaviour(Container $container): void
     {
-        static::addEnvironment($container);
+        self::addEnvironment($container);
         $environment = self::getEnvironment($container);
         $environment->load();
         $environment->required(['APPLICATION_NAME']);