Bump vtr-verilog-to-routing from 254d38f to b4a41b5

Bumps [vtr-verilog-to-routing](https://github.com/verilog-to-routing/vtr-verilog-to-routing) from `254d38f` to `b4a41b5`.
- [Release notes](https://github.com/verilog-to-routing/vtr-verilog-to-routing/releases)
- [Commits](verilog-to-routing/vtr-verilog-to-routing@254d38f...b4a41b5)

---
updated-dependencies:
- dependency-name: vtr-verilog-to-routing
  dependency-type: direct:production
...

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