Bump @walletconnect/sign-client from 2.15.1 to 2.16.0

Bumps [@walletconnect/sign-client](https://github.com/walletconnect/walletconnect-monorepo) from 2.15.1 to 2.16.0.
- [Release notes](https://github.com/walletconnect/walletconnect-monorepo/releases)
- [Commits](WalletConnect/walletconnect-monorepo@2.15.1...2.16.0)

---
updated-dependencies:
- dependency-name: "@walletconnect/sign-client"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>