## Description
Add a warning text for users in DOCs, that will notify them about
forbidden characters while using `text` as a custom ID.
It resolves#7021
- [x] I have read and understand the
[CONTRIBUTING.md](https://github.com/payloadcms/payload/blob/main/CONTRIBUTING.md)
document in this repository.
## Type of change
<!-- Please delete options that are not relevant. -->
- [x] Chore (non-breaking change which does not add functionality)
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Change to the
[templates](https://github.com/payloadcms/payload/tree/main/templates)
directory (does not affect core functionality)
- [ ] Change to the
[examples](https://github.com/payloadcms/payload/tree/main/examples)
directory (does not affect core functionality)
- [ ] This change requires a documentation update
## Checklist:
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] Existing test suite passes locally with my changes
- [x] I have made corresponding changes to the documentation
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