Update API AccountTransformer, fix https://mastodon.social/users/tom79/statuses/101410506495350462

app/Transformer/Api/AccountTransformer.php

@@ -28,6 +28,7 @@ class AccountTransformer extends Fractal\TransformerAbstract
 			'moved' => null,
 			'fields' => null,
 			'bot' => null,
+			'software' => 'pixelfed'
 		];
 	}
 }