ci(central): set GPG import to use global git config

.github/workflows/maven-central-release.yml

@@ -37,6 +37,7 @@ jobs:
         with:
           gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
           passphrase: ${{ secrets.GPG_PASSPHRASE }}
+          git_config_global: true
           git_user_signingkey: true
           git_commit_gpgsign: true
       - name: Commit & Push changes