Bump chisel3 from `d9009d5b` to `48203e60` (#175)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `d9009d5b` to `48203e60`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/d9009d5b2e75063d4f554987f2cf5d4a0d5f0938...48203e605538511f012f21629f641e89efd46d0e

)

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

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