docs: add haru-02 as a contributor

[allcontributors]

Adds @haru-02 as a contributor for code, maintenance.

This was requested by DesignrKnight in this comment

[github-actions]

Hello @allcontributors[bot] , That's a great improvement to the code. Have a pinch of paitence while the reviewer gets impressed by the changes you made. Here are some doggos for company while you are waiting for the merge and marching ahead with your Hacktoberfest Contributions, Check your Dashboard for more information on Hacktoberfest. Stay safe 🚀 .

[allcontributors]

@github-actions[bot]

I could not determine your intention.

Basic usage: @all-contributors please add @Someone for code, doc and infra

For other usages see the documentation