Make folder validation an error

Author: sebromero

package.json

@@ -1,6 +1,6 @@
 {
   "name": "content-lint",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "type": "module",
   "main": "index.js",
   "description": "A node.js infrastructure to validate markdown content.",

validations/naming.js

@@ -7,7 +7,7 @@ import { ValidationIssue } from '../domain/validation-issue.js';
  */
 function validateFolderName(article) {
     let errorsOccurred = [];
-    const issueType = ValidationIssue.Type.WARNING;
+    const issueType = ValidationIssue.Type.ERROR;
 
     if(article.path.indexOf("_") != -1){
         const errorMessage = "Folder path uses discouraged underscore.";