Bump verilator/master from 676fd31 to 9656311 (#683)

Bumps [verilator/master](https://github.com/verilator/verilator) from `676fd31` to `9656311`.
- [Commits](verilator/verilator@676fd31...9656311)

---
updated-dependencies:
- dependency-name: verilator/master
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>