Bump jsonrpsee from 0.16.2 to 0.20.2

Bumps [jsonrpsee](https://github.com/paritytech/jsonrpsee) from 0.16.2 to 0.20.2.
- [Release notes](https://github.com/paritytech/jsonrpsee/releases)
- [Changelog](https://github.com/paritytech/jsonrpsee/blob/v0.20.2/CHANGELOG.md)
- [Commits](paritytech/jsonrpsee@v0.16.2...v0.20.2)

---
updated-dependencies:
- dependency-name: jsonrpsee
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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