chore: Adds Papermark

[tanayvaswani]

What does this PR do?

Adds Papermark to the list of oss-friends.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Chore (refactoring code, technical debt, workflow improvements)
• Enhancement (small improvements)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change adds a new database migration
• This change requires a documentation update

How should this be tested?

Can be checked on the page of OSS Friends.

[vercel]

@tanayvaswani is attempting to deploy a commit to the formbricks Team on Vercel.

A member of the Team first needs to authorize it.

[github-actions]

Thank you for following the naming conventions for pull request titles! 🙏