build(deps): bump third_party/cores/ariane from 668829d to 6561f2c

Bumps [third_party/cores/ariane](https://github.com/pulp-platform/ariane) from `668829d` to `6561f2c`.
- [Release notes](https://github.com/pulp-platform/ariane/releases)
- [Commits](openhwgroup/cva6@668829d...6561f2c)

---
updated-dependencies:
- dependency-name: third_party/cores/ariane
  dependency-type: direct:production
...

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