## Description
removed trailing whitespace on 2 line(s) in `CONTRIBUTING.md`
## Type of change
- [x] Documentation improvement
## Checklist
- [x] I have read the CONTRIBUTING guide
- [x] My changes follow the existing style
Co-authored-by: Mulky Malikul Adhr <mulkymalikuldhrs@users.noreply.github.com>
