Bump newsroom-core from 4999e46 to 0686e3a in /client

Bumps [newsroom-core](https://github.com/superdesk/newsroom-core) from `4999e46` to `0686e3a`.
- [Release notes](https://github.com/superdesk/newsroom-core/releases)
- [Commits](superdesk/newsroom-core@4999e46...0686e3a)

---
updated-dependencies:
- dependency-name: newsroom-core
  dependency-type: direct:production
...

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