fix: Workflow always print "error:" even if there are none (#8978)

Fix issue [https://github.com/medusajs/medusa/issues/8976](https://github.com/medusajs/medusa/issues/8976)

packages/core/workflows-sdk/src/helper/workflow-export.ts

@@ -527,8 +527,10 @@ function attachOnFinishReleaseEvents(
         )
         .join(EOL + separator + EOL)
 
+      if (allWorkflowErrors) {
         logger.error(allWorkflowErrors)
       }
+    }
 
     await onFinish?.(args)