Add missing CallbackProperty type that is supposed to be here

[Levi-Montgomery]

Description

I added a missing type, you are supposed to be able to update entity position with a callback property.

Previously you would get a type error when trying to update the entity position with a callback (a supported feature). This could be worked around by ignoring the type error but this is a proper fix.

Issue number and link

Testing plan

I see type error go away

Author checklist

• [X ] I have submitted a Contributor License Agreement
• [ X] I have added my name to CONTRIBUTORS.md
• [ X] I have updated CHANGES.md with a short summary of my change
• [ X] I have added or updated unit tests to ensure consistent code coverage
• [ X] I have updated the inline documentation, and included code examples where relevant
• [ X] I have performed a self-review of my code

[github-actions]

Thank you for the pull request, @Levi-Montgomery!

✅ We can confirm we have a CLA on file for you.

[ggetz]

Thanks for the fix @Levi-Montgomery!