fix: add release actor gpg key fingerprint (#89)

## Summary
Fixes broken release-please workflow, after rotation of GPG keys. We
moved to a subkey based signing approach, which now requires that we
pass the gpg subkey fingerprint as described here:
circlefin/circle-public-github-workflows#24

## Detail
### Changeset
Mandatory section.

### Checklist
- [ ] Did you add new tests and confirm all tests pass? (`yarn test`)
- [ ] Did you ensure any new Solidity source code files meet minimum
test coverage requirements? (`yarn coverage`)
- [ ] Did you update relevant docs? (docs are found in the `docs`
folder)
- [x] Do your commits follow the [Conventional
Commits](https://www.conventionalcommits.org/en/v1.0.0/) standard?
- [x] Does your PR title also follow the [Conventional
Commits](https://www.conventionalcommits.org/en/v1.0.0/) standard?
- [ ] Did you run lint (`yarn lint`) and fix any issues?
- [ ] Did you run formatter (`yarn format:check`) and fix any issues
(`yarn format:write`)?

## Testing
Mandatory section.
For each changeset, please highlight the tests you've added.

## Documentation
Optional section.
Link to the doc.

Author: wparr-circle

.github/workflows/release.yaml

@@ -17,6 +17,7 @@ jobs:
       RELEASE_TOKEN: ${{ secrets.PUBLIC_RELEASES_TOKEN }}
       RELEASE_ACTOR_GPG_PRIVATE_KEY: ${{ secrets.PUBLIC_RELEASES_GPG_PRIVATE_KEY }}
       RELEASE_ACTOR_GPG_PASSPHRASE: ${{ secrets.PUBLIC_RELEASES_GPG_PASSPHRASE }}
+      RELEASE_ACTOR_GPG_KEY_FINGERPRINT: ${{ secrets.PUBLIC_RELEASES_GPG_FINGERPRINT }}
 
   release_sbom:
     needs: pr_lint_and_release