Bump third-party/verilator/master from 0640ddb to caca1fc (#867)

Bumps [third-party/verilator/master](https://github.com/verilator/verilator) from `0640ddb` to `caca1fc`.
- [Commits](verilator/verilator@0640ddb...caca1fc)

---
updated-dependencies:
- dependency-name: third-party/verilator/master
  dependency-version: caca1fcef0a3071444b4f6fbff04070d5c0f7bff
  dependency-type: direct:production
...

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

Author: dependabot[bot]