fix: select boolean false value

[Paul-Bob]

Description

Fixes select field on boolean attributes when value is false.

field :is_capital,
  as: :select,
  options: {
    'Yes': true,
    'No': false
  }

1 - Before
2 - After

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

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[github-actions]

This PR has been merged into main. The functionality will be available in the next release.

Please check the release guide for more information.