Bump aiida-core from cf091e8 to 6cb91c1 (#181)

Bumps [aiida-core](https://github.com/aiidateam/aiida-core) from `cf091e8` to `6cb91c1`.
- [Release notes](https://github.com/aiidateam/aiida-core/releases)
- [Commits](aiidateam/aiida-core@cf091e8...6cb91c1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>