Bump chisel3 from `bfa9f746` to `be4463a7` (#360)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `bfa9f746` to `be4463a7`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/bfa9f7465e6069b1e624126f9e14245b69e7c0a9...be4463a7756351dcab09ba3f576f5e3687fb0ebf

)

---
updated-dependencies:
- dependency-name: chisel3
  dependency-type: direct:production
...

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