[Reflection\attr?] update the docs to cover behavior

[RickBarretto]

Description

Shows that attr? does not pop the attributes' stack.

Related: https://discord.com/channels/765519132186640445/1245435661495046144 Thanks to @BNAndras.

Type of change

• [ ] Code cleanup
• [ ] Unit tests (added or updated unit-tests)
• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Enhancement (implementation update, or general performance enhancements)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Documentation (documentation-related additions)

[drkameleon]

Ready to merge! 🚀