Certificates: Formatting code with code block markdown

src/pages/certifications/javascript-algorithms-and-data-structures/functional-programming/apply-functional-programming-to-convert-strings-to-url-slugs/index.md

@@ -3,6 +3,7 @@ title: Apply Functional Programming to Convert Strings to URL Slugs
 ---
 ## Apply Functional Programming to Convert Strings to URL Slugs
 
+```javascript
 // the global variable
 var globalTitle = "Winter Is Coming";
 
@@ -16,3 +17,4 @@ return title.split(/\W/).filter((obj)=>{
 // Add your code above this line
 
 var winterComing = urlSlug(globalTitle); // Should be "winter-is-coming"
+```