Update contributors.yaml

[walidAITLHAJ]

i hope i'm doing this correctly, this is my first time. i registered for the Hacktoberfest open source event and just wanna learn and contribute.

Is your pull request related to a problem? Please describe

A clear and concise description of what the problem is. Ex. I'm always frustrated when ...

Describe the solution you'd like

A clear and concise description of what you want to happen.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

Add any other context or screenshots about the feature request here.

Test plan

A good test plan should give instructions that someone else can easily follow. Also add a link to your own Messenger experience for your reviewer to test the changes.

Checklist

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [v] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.
• [ ] The title of my pull request is a short description of the requested changes.
• [ ] I have added the label enhancement to my pull request.

[facebook-github-bot]

Hi @walidAITLHAJ!

Thank you for your pull request and welcome to our community. We require contributors to sign our Contributor License Agreement, and we don't seem to have you on file.

In order for us to review and merge your code, please sign at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need to sign the corporate CLA.

If you have received this in error or have any questions, please contact us at cla@fb.com. Thanks!

[facebook-github-bot]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Facebook open source project. Thanks!

[0xHieu]

@walidAITLHAJ I have reviewed your pull request and it has conflicts. You have to resolve these conflicts, then I will merge your pull request.