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

Bumps [qs](https://github.com/ljharb/qs) to 6.11.0 and updates ancestor dependency [expo](https://github.com/expo/expo/tree/HEAD/packages/expo). These dependencies need to be updated together.


Updates `qs` from 6.7.0 to 6.11.0
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](ljharb/qs@v6.7.0...v6.11.0)

Updates `expo` from 47.0.8 to 47.0.14
- [Changelog](https://github.com/expo/expo/blob/main/CHANGELOG.md)
- [Commits](https://github.com/expo/expo/commits/HEAD/packages/expo)

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

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