Bump superdesk-planning from dd5b524 to b616663 in /client

Bumps [superdesk-planning](https://github.com/superdesk/superdesk-planning) from `dd5b524` to `b616663`.
- [Release notes](https://github.com/superdesk/superdesk-planning/releases)
- [Commits](superdesk/superdesk-planning@dd5b524...b616663)

---
updated-dependencies:
- dependency-name: superdesk-planning
  dependency-type: direct:production
...

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