fix: add release actor gpg key fingerprint (#36)

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

Author: wparr-circle

.github/workflows/release.yml

@@ -19,6 +19,7 @@ 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 }}
 
   goreleaser:
     needs: