build(deps): bump aleph-alpha-client from 7.6.0 to 8.1.0

Bumps [aleph-alpha-client](https://github.com/Aleph-Alpha/aleph-alpha-client) from 7.6.0 to 8.1.0.
- [Release notes](https://github.com/Aleph-Alpha/aleph-alpha-client/releases)
- [Changelog](https://github.com/Aleph-Alpha/aleph-alpha-client/blob/main/Changelog.md)
- [Commits](Aleph-Alpha/aleph-alpha-client@v7.6.0...v8.1.0)

---
updated-dependencies:
- dependency-name: aleph-alpha-client
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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