Bump yosys from 9e00442 to b84ed5d

Bumps [yosys](https://github.com/YosysHQ/yosys) from `9e00442` to `b84ed5d`.
- [Release notes](https://github.com/YosysHQ/yosys/releases)
- [Commits](YosysHQ/yosys@9e00442...b84ed5d)

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

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