fix typeerror

src/Potter/Environment/Behaviour.php

@@ -21,7 +21,7 @@ trait Behaviour
             ->required(['APPLICATION_NAME']);
     }
     
-    private static function getEnvironment(Container $container): Environment
+    private static function getEnvironment(Container $container): \Dotenv\Dotenv
     {
         return $container->get(Environment::class);
     }