docs: add PayneJoe as a contributor for code

[allcontributors[bot]]

Adds @PayneJoe as a contributor for code.

This was requested by weikengchen in this comment

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

[weikengchen]

@allcontributors Can you rebase?

[allcontributors[bot]]

@weikengchen

I could not determine your intention.

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

For other usages see the documentation