[cd] Bump CIRCT from firtool-1.77.0 to firtool-1.78.0

[chiselbot]

[cd] Bump CIRCT from firtool-1.77.0 to firtool-1.78.0

This is an automated commit generated by the circt/update-circt GitHub Action.

There were no commits that were cherry-picked from the ci/ci-circt-nightly branch.

Release Notes

Bump CIRCT from firtool-1.77.0 to firtool-1.78.0.

Release notes for new CIRCT versions can be found at the following links:

• firtool-1.78.0
• pycde-0.5.1

[seldridge]

Closing in favor of the bump to 1.78.1.