fix: move invalid optionnal JSON output messsage to debug level

Author: pvdlg

index.js

@@ -67,7 +67,7 @@ async function publish(pluginConfig, context) {
       debug(stdout);
       debug(error);
 
-      context.logger.log(
+      debug(
         `The command ${pluginConfig.publishCmd ||
           pluginConfig.cmd} wrote invalid JSON to stdout. The stdout content will be ignored.`
       );