Fix release workflow (#296)

Author: hbelmiro

.github/workflows/release.yml

@@ -26,7 +26,7 @@ jobs:
         id: import_gpg
         uses: crazy-max/ghaction-import-gpg@v5
         with:
-          gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
+          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
           passphrase: ${{ secrets.GPG_PASSPHRASE }}
 
       - name: Set up JDK 11