Build(deps): Bump third_party/yosys from 6f3376c to 954250d

Bumps [third_party/yosys](https://github.com/YosysHQ/yosys) from `6f3376c` to `954250d`.
- [Release notes](https://github.com/YosysHQ/yosys/releases)
- [Commits](YosysHQ/yosys@6f3376c...954250d)

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

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