Update @iobroker/adapter-core requirement from ^2.5.1 to ^2.6.0
Update @iobroker/adapter-core requirement from ^2.5.1 to ^2.6.0

Updates the requirements on [@iobroker/adapter-core](https://github.com/ioBroker/adapter-core) to permit the latest version.
- [Release notes](https://github.com/ioBroker/adapter-core/releases)
- [Commits](https://github.com/ioBroker/adapter-core/compare/v2.5.1...v2.6.0)

---
updated-dependencies:
- dependency-name: "@iobroker/adapter-core"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
ioBroker/ioBroker.sayit,ioBroker/ioBroker.sayit