chore(deps): bump styled-components in /extensions/react-widget

Bumps [styled-components](https://github.com/styled-components/styled-components) from 6.3.12 to 6.4.0.
- [Release notes](https://github.com/styled-components/styled-components/releases)
- [Commits](https://github.com/styled-components/styled-components/compare/styled-components@6.3.12...styled-components@6.4.0)

---
updated-dependencies:
- dependency-name: styled-components
  dependency-version: 6.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]