Bump chisel3 from `91ad2312` to `cb77b061` (#254)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `91ad2312` to `cb77b061`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/91ad2312cab72442fcfec9c28576b5464669f8fd...cb77b061e835044b4f3a2b718fb7ce3971b5d06e

)

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

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