fix: add links to relevant style guide

validation/guideFolderChecks/frontmatterCheck.js

@@ -1,18 +1,19 @@
 const matter = require('gray-matter');
 const _ = require('lodash');
+const dedent = require('dedent');
 
 const frontmatterCheck = (fullPath, isTranslation, fileContent) => {
   const { data: frontmatter } = matter(fileContent);
   let errors = [];
   if (!frontmatter || _.isEmpty(frontmatter) || !frontmatter.title) {
     errors.push({
-      msg: `Misplaced frontmatter or missing \`title key\` frontmatter.`,
+      msg: `Misplaced or missing \`title\` keyword in the front matter block. Review the [style guide](https://github.com/freeCodeCamp/freeCodeCamp/blob/master/docs/style-guide-for-guide-articles.md#title) for more details.`,
       fullPath
     });
   }
   if (isTranslation && !frontmatter.localeTitle) {
     errors.push({
-      msg: `Missing \`localeTitle key\`frontmatter.`,
+      msg: `Missing \`localeTitle\` keyword in the front matter block. Review the [style guide](https://github.com/freeCodeCamp/freeCodeCamp/blob/master/docs/style-guide-for-guide-articles.md#title) for more details.`,
       fullPath
     });
   }