Bump chisel3 from `9f148457` to `bb3ef96d` (#335)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `9f148457` to `bb3ef96d`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/9f1484572e2e4185e87a9cfb03b253870636c12c...bb3ef96d8911dbba4e22926ad4ce71eb8ab0d869

)

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

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