Bump yosys from 6937241 to 229d1ea

Bumps [yosys](https://github.com/YosysHQ/yosys) from `6937241` to `229d1ea`.
- [Release notes](https://github.com/YosysHQ/yosys/releases)
- [Commits](YosysHQ/yosys@6937241...229d1ea)

---
updated-dependencies:
- dependency-name: yosys
  dependency-type: direct:production
...

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