Bump sinon from 21.0.2 to 21.0.3 in the default group

Bumps the default group with 1 update: [sinon](https://github.com/sinonjs/sinon).


Updates `sinon` from 21.0.2 to 21.0.3
- [Release notes](https://github.com/sinonjs/sinon/releases)
- [Changelog](https://github.com/sinonjs/sinon/blob/main/docs/changelog.md)
- [Commits](sinonjs/sinon@v21.0.2...v21.0.3)

---
updated-dependencies:
- dependency-name: sinon
  dependency-version: 21.0.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: default
...

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Author: dependabot[bot]