Update demo form email field to Business Email (#38)

- Change email field label from 'Email' to 'Business Email'
- Update placeholder from '[email protected]' to '[email protected]'
- Aligns with existing business email validation logic

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Alek <[email protected]>

Author: devin-ai-integration[bot]

reflex_ui/blocks/demo_form.py

@@ -392,7 +392,7 @@ def get_component(cls, **props):
                 input_field("Last name", "Smith", "last_name", "text", True),
                 class_name="grid grid-cols-2 gap-4",
             ),
-            input_field("Email", "john@example.com", "email", "email", True),
+            input_field("Business Email", "john@company.com", "email", "email", True),
             rx.el.div(
                 input_field("Job title", "CTO", "job_title", "text", True),
                 input_field(