build(deps): bump third_party/cores/ariane from faf4536 to 6249bd1

Bumps [third_party/cores/ariane](https://github.com/pulp-platform/ariane) from `faf4536` to `6249bd1`.
- [Release notes](https://github.com/pulp-platform/ariane/releases)
- [Commits](openhwgroup/cva6@faf4536...6249bd1)

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

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