Bump uhdm-tests/ibex/ibex from cfeef7e to d1aff2f

Bumps [uhdm-tests/ibex/ibex](https://github.com/lowRISC/ibex) from `cfeef7e` to `d1aff2f`.
- [Release notes](https://github.com/lowRISC/ibex/releases)
- [Commits](lowRISC/ibex@cfeef7e...d1aff2f)

---
updated-dependencies:
- dependency-name: uhdm-tests/ibex/ibex
  dependency-type: direct:production
...

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