Fix(form-validations): Fix form IDs in form-validations demo

[pavelklibani]

Description

The form validation demo was not validating

[netlify]

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Lighthouse	1 paths audited Performance: 96 (no change from production) Accessibility: 93 (no change from production) Best Practices: 100 (no change from production) SEO: 82 (no change from production) PWA: - View the detailed breakdown and full score reports

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[coveralls]

coverage: 78.751%. remained the same
when pulling 9b85f93 on fix/form-validations-demo
into 460f31a on main.