Bump third-party/verilator/master from 28ee2eb to 63f5f5c (#863)

Bumps [third-party/verilator/master](https://github.com/verilator/verilator) from `28ee2eb` to `63f5f5c`.
- [Commits](verilator/verilator@28ee2eb...63f5f5c)

---
updated-dependencies:
- dependency-name: third-party/verilator/master
  dependency-version: 63f5f5c328fa15a839c7316b711f9e1558ad67ed
  dependency-type: direct:production
...

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

Author: dependabot[bot]