Add @ChengyuZhu6 as part of the maintainers group

[fidencio]

@ChengyuZhu6 has been doing an amazing work on the Kata Containers and Confidential Containers front and this expands the Kata Containers community.

He's been deeply involved in the image-pull effort, and has working on different projects to be able to close the gaps on our side, and proivide a better product to the Confidential Containers project.

Here you can find @ChengyuZhu6's contributions to the Kata Containers:
https://github.com/kata-containers/kata-containers/pulls?q=author%3AChengyuZhu6
https://github.com/kata-containers/tests/pulls?q=author%3AChengyuZhu6

[stevenhorsman]

Complete agreement from me. Thanks Chengyu for all the amazing work!

[BbolroC]

Absolutely! +1 from me. Thanks a lot @ChengyuZhu6!

[jepio]

+1, thanks for your work

[jiangliu]

+1, thanks for your great work:)

[danmihai1]

Sounds good - welcome Chengyu!

[GabyCT]

+1 :)

[arronwy]

+1, welcome :)

[gkurz]

+1

[bergwolf]

+1, welcome!

[fidencio]

@ChengyuZhu6, you've been added as part of the maintainers.
Keep rocking!

[ChengyuZhu6]

Thank you for the recognition and the opportunity to work on kata and coco. I enjoyed collaborating with you all and learning from you!