Bump uhdm-tests/ibex/ibex from 416ecb1 to cfeef7e

Bumps [uhdm-tests/ibex/ibex](https://github.com/lowRISC/ibex) from `416ecb1` to `cfeef7e`.
- [Release notes](https://github.com/lowRISC/ibex/releases)
- [Commits](lowRISC/ibex@416ecb1...cfeef7e)

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

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

Author: dependabot[bot]