chore(deps): bump @radix-ui/react-dropdown-menu in /ui (#47)

Bumps [@radix-ui/react-dropdown-menu](https://github.com/radix-ui/primitives/tree/HEAD/packages/react/dropdown-menu) from 2.1.16 to 2.1.20.
- [Changelog](https://github.com/radix-ui/primitives/blob/main/packages/react/dropdown-menu/CHANGELOG.md)
- [Commits](https://github.com/radix-ui/primitives/commits/HEAD/packages/react/dropdown-menu)

---
updated-dependencies:
- dependency-name: "@radix-ui/react-dropdown-menu"
  dependency-version: 2.1.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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