Only Deploy Central if Release

Issue gh-70

Author: rwinch

.github/workflows/deploy-artifacts.yml

@@ -99,6 +99,7 @@ jobs:
           ORG_GRADLE_PROJECT_signingPassword: ${{ secrets.GPG_PASSPHRASE }}
         run: ./gradlew publishAllPublicationsToLocalRepository --stacktrace
       - name: Publish Staged Artifacts to Central
+        if: ${{ steps.deploy-location.outputs.deploy_location == 'central' }}
         uses: spring-io/central-publish-action@0cdd90d12e6876341e82860d951e1bcddc1e51b6 # v0.2.0
         with:
           token-name: ${{ secrets.CENTRAL_TOKEN_USERNAME }}