docs: add tiennm99 as a contributor for code (#2566)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

allcontributors[bot] committed 3y ago

42bff6a9f57a2f4aa75997e14d62111dcbbc8035

Parent: 2154e77

Committed by GitHub <noreply@github.com> on 8/20/2023, 7:29:12 AM