Enable release signing in CI

Author: gpunto

.github/workflows/release.yml

@@ -65,6 +65,7 @@ jobs:
           ORG_GRADLE_PROJECT_signingInMemoryKey: ${{ secrets.SIGNING_KEY }}
           ORG_GRADLE_PROJECT_signingInMemoryKeyId: ${{ secrets.SIGNING_KEY_ID }}
           ORG_GRADLE_PROJECT_signingInMemoryKeyPassword: ${{ secrets.SIGNING_PASSWORD }}
+          RELEASE_SIGNING_ENABLED: true
 
       - name: Create Github Release
         uses: ncipollo/[email protected]