Bump chisel3 from 7690cd6 to 87806e5

Bumps [chisel3](https://github.com/chipsalliance/chisel3) from `7690cd6` to `87806e5`.
- [Release notes](https://github.com/chipsalliance/chisel3/releases)
- [Commits](chipsalliance/chisel@7690cd6...87806e5)

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

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