Update Form.tsx and make submit method public

[popmanhe]

Reasons for making this change

The submit method is not a public method. Somehow, it does not work in some senarios.

If this is related to existing tickets, include links to them as well. Use the syntax fixes #[issue number] (ex: fixes #123).

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Checklist

• I'm updating documentation
  • I've checked the rendering of the Markdown text I've added
• [x ] I'm adding or updating code
  • [x ] I've added and/or updated tests. I've run npm run test:update to update snapshots, if needed.
  • I've updated docs if needed
  • I've updated the changelog with a description of the PR
• I'm adding a new feature
  • I've updated the playground with an example use of the feature

[heath-freenome]

@popmanhe Can you please update your PR after running npm run cs-format? The linter is failing

[popmanhe]

npm run cs-format executed

[heath-freenome]

@popmanhe And can you also update the CHANGELOG.md for core explaining the fix and referencing the issue. Thanks!