Fix data type in FieldTemplateProps['onChange']

[aularon]

Reasons for making this change

Typing is not passed on, so even if we have a type (<T>) on FieldTemplateProps, its onChange method is typed to have any as first argument, which is incorrect. This fixes it.

Checklist

• I'm adding or updating code
  • 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

[heath-freenome]

@aularon Good catch! Thanks for the fix. Can you resolve the conflict in CHANGELOG.md and I'll approve and merge

[aularon]

@aularon Good catch! Thanks for the fix. Can you resolve the conflict in CHANGELOG.md and I'll approve and merge

@heath-freenome Done. Happy to help! Thank you 🙏

[heath-freenome]

You can just move this down under the @rjsf/utils below in 5.13.1 since it has yet to be published... I.e.:

# 5.13.1

## @rjsf/utils
- Added `getOptionMatchingSimpleDiscriminator()` function
- `getMatchingOption` and `getClosestMatchingOption` now bypass `validator.isValid()` calls when simple discriminator is provided, fixing [#3692](https://github.com/rjsf-team/react-jsonschema-form/issues/3692)
- Fix data type in `FieldTemplateProps['onChange']`

[aularon]

I thought it was already published! Fixed now.