Bump newsroom-core from fbfa08e to f53621b in /client

Bumps [newsroom-core](https://github.com/superdesk/newsroom-core) from `fbfa08e` to `f53621b`.
- [Release notes](https://github.com/superdesk/newsroom-core/releases)
- [Commits](superdesk/newsroom-core@fbfa08e...f53621b)

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

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