fix(curriculum): remove TypeError messages (freeCodeCamp#59529)

Author: Supravisor

Diff for: curriculum/challenges/english/25-front-end-development/lab-business-card/6690e10ebe2181212abc9652.md

@@ -247,41 +247,40 @@ assert.equal(document.querySelector('.social-media h2').textContent, 'Connect wi
 Inside the `.social-media` element, there should be an `a` element with the text `Twitter`.
 
 ```js
-assert.equal(document.querySelectorAll(".social-media a")[0].textContent, 'Twitter');
+assert.equal(document.querySelectorAll(".social-media a")[0]?.textContent, 'Twitter');
 ```
 
 The Twitter `href` should point to a valid link.
 
 ```js
-assert.isAbove(document.querySelectorAll('.social-media a')[0].getAttribute('href').length, 0);
+assert.isAbove(document.querySelectorAll('.social-media a')[0]?.getAttribute('href')?.length, 0);
 ```
 
 Inside the `.social-media` element, there should be an `a` element with the text `LinkedIn`.
 
 ```js
 
-assert.equal(document.querySelectorAll(".social-media a")[1].textContent, 'LinkedIn');
+assert.equal(document.querySelectorAll(".social-media a")[1]?.textContent, 'LinkedIn');
 ```
 
 The LinkedIn `href` should point to a valid link.
 
 ```js
-assert.isAbove(document.querySelectorAll('.social-media a')[1].getAttribute('href').length, 0);
+assert.isAbove(document.querySelectorAll('.social-media a')[1]?.getAttribute('href')?.length, 0);
 ```
 
 Inside the `.social-media` element, there should be an `a` element with the text `GitHub`.
 
 ```js
-assert.equal(document.querySelectorAll(".social-media a")[2].textContent, 'GitHub');
+assert.equal(document.querySelectorAll(".social-media a")[2]?.textContent, 'GitHub');
 ```
 
 The GitHub `href` should point to a valid link.
 
 ```js
-assert.isAbove(document.querySelectorAll('.social-media a')[2].getAttribute('href').length, 0);
+assert.isAbove(document.querySelectorAll('.social-media a')[2]?.getAttribute('href')?.length, 0);
 ```
 
-
 # --seed--
 
 ## --seed-contents--