fix(curriculum): Consolidated comments for JavaScript Algorithms and Data Structures challenges - part 4 of 4 (#38267)

* fix: consolidate comments


Co-authored-by: Parth Parth <34807532+thecodingaviator@users.noreply.github.com>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-the-javascript-console-to-check-the-value-of-a-variable.english.md

@@ -40,7 +40,7 @@ tests:
 let a = 5;
 let b = 1;
 a++;
-// Add your code below this line
+// Only change code below this line
 
 
 let sumAB = a + b;

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-typeof-to-check-the-type-of-a-variable.english.md

@@ -50,7 +50,7 @@ tests:
 let seven = 7;
 let three = "3";
 console.log(seven + three);
-// Add your code below this line
+// Only change code below this line
 
 ```