chore(deps): bump rxdb from 14.17.1 to 15.6.1

Bumps [rxdb](https://github.com/pubkey/rxdb) from 14.17.1 to 15.6.1.
- [Release notes](https://github.com/pubkey/rxdb/releases)
- [Changelog](https://github.com/pubkey/rxdb/blob/master/CHANGELOG.md)
- [Commits](pubkey/rxdb@14.17.1...15.6.1)

---
updated-dependencies:
- dependency-name: rxdb
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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