chore(deps): bump json5 and expo in /example/sign-app

Bumps [json5](https://github.com/json5/json5) to 2.2.3 and updates ancestor dependency [expo](https://github.com/expo/expo/tree/HEAD/packages/expo). These dependencies need to be updated together.


Updates `json5` from 2.2.1 to 2.2.3
- [Release notes](https://github.com/json5/json5/releases)
- [Changelog](https://github.com/json5/json5/blob/main/CHANGELOG.md)
- [Commits](json5/json5@v2.2.1...v2.2.3)

Updates `expo` from 47.0.8 to 49.0.8
- [Changelog](https://github.com/expo/expo/blob/main/CHANGELOG.md)
- [Commits](https://github.com/expo/expo/commits/HEAD/packages/expo)

---
updated-dependencies:
- dependency-name: json5
  dependency-type: indirect
- dependency-name: expo
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>