This PR updates the contact form validation to allow a minimum length of one character for the first name.
Fixes
https://linear.app/chatwoot/issue/CW-3993/update-the-validation-on-contact-form-to-support-just-one-character
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
https://github.com/user-attachments/assets/2b95af80-ee70-4f4b-8d0d-b01779db9d94
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules
