Bump yosys from 41b34a1 to 31ee566

Bumps [yosys](https://github.com/YosysHQ/yosys) from `41b34a1` to `31ee566`.
- [Release notes](https://github.com/YosysHQ/yosys/releases)
- [Commits](YosysHQ/yosys@41b34a1...31ee566)

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

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