Bump chisel3 from 8fe8764 to 294bf10 (#375)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `8fe8764` to `294bf10`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](8fe8764...294bf10)

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

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>