Bump yosys from 59404f8 to 1bf908d

Bumps [yosys](https://github.com/YosysHQ/yosys) from `59404f8` to `1bf908d`.
- [Release notes](https://github.com/YosysHQ/yosys/releases)
- [Commits](YosysHQ/yosys@59404f8...1bf908d)

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

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