Bump firrtl from `d69daef` to `794e4be` (#137)

Bumps [firrtl](https://github.com/freechipsproject/firrtl) from `d69daef` to `794e4be`.
- [Release notes](https://github.com/freechipsproject/firrtl/releases)
- [Commits](https://github.com/freechipsproject/firrtl/compare/d69daef3e18ce8ad175f0220fae0be95a46d25fd...794e4be836789e2ca36cc92958f0d99fb5b89b5d

)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>