Added Khadija to SFDC Stop Contributors

[Khadija-P]

My First pull request

[rahulmalhotra]

Hi @Khadija-P your PR looks good, only a small change is needed. If you see here, the .sf folder is committed as well which is not required. You can follow the following steps to fix it:

1. Delete .sf folder and commit
2. [Optional] Add .sf folder to .gitignore file and commit again (this will ensure nobody will face the same issue as you in future)
3. Push the commit(s) to update your PR.

The 1st and 3rd steps are also followed in this PR you can check this out for reference.