Bump @emotion/styled from 11.13.0 to 11.14.0 in /src/frontend

Bumps [@emotion/styled](https://github.com/emotion-js/emotion) from 11.13.0 to 11.14.0.
- [Release notes](https://github.com/emotion-js/emotion/releases)
- [Changelog](https://github.com/emotion-js/emotion/blob/main/CHANGELOG.md)
- [Commits](https://github.com/emotion-js/emotion/compare/@emotion/styled@11.13.0...@emotion/styled@11.14.0)

---
updated-dependencies:
- dependency-name: "@emotion/styled"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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