Change of Copyright notice

[julia410m]

Hello! According to the Appendix of Apache License 2.0, if you want to license your software under this License you should "attach the boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information". This condition is not met now. Please add a copyright notice in the appropriate form, including the year of the software development and your name and surname. Thank you in advance

Copyright [yyyy] [name of copyright owner]

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

[Petrus Nguyễn Thái Học]

Thanks @julia410m , fixed 🙏