Bump chisel3 from `41d0d4cd` to `8fe87646` (#373)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `41d0d4cd` to `8fe87646`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/41d0d4cd075130cb6b4e41a7c7b6183830b5b9bc...8fe876463e26d1b63e36a7ebf4a2bc62366cce81

)

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

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