Migrate zone [skip ci]

zone/bot_command.cpp

@@ -1061,7 +1061,7 @@ private:
 			return;
 
 		std::string query = "SELECT `short_name`, `long_name` FROM `zone` WHERE '' NOT IN (`short_name`, `long_name`)";
-		auto results = database.QueryDatabase(query);
+		auto results = content_db.QueryDatabase(query);
 		if (!results.Success()) {
 			LogError("load_teleport_zone_names() - Error in zone names query: [{}]", results.ErrorMessage().c_str());
 			return;