refactor: Do not recognize YAML Exception as user error

Author: medikoo

lib/utils/tokenize-exception.js

@@ -3,7 +3,7 @@
 const { inspect } = require('util');
 const isError = require('type/error/is');
 
-const userErrorNames = new Set(['ServerlessError', 'YAMLException']);
+const userErrorNames = new Set(['ServerlessError']);
 
 module.exports = (exception) => {
   if (isError(exception)) {