fix(coding): uncomment destructuring test and add solution (#18909)

* fix(coding): uncomment destructuring test and add solution

the test that ensured destructuring was being used had been left commented out and there was no solution offered. I uncommented the test and verified it worked as well as added the solution.

* fix: corrected partial solution to full

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-arrays.english.md

@@ -30,7 +30,7 @@ tests:
   - text: Value of <code>b</code> should be 8, after swapping.
     testString: assert(b === 8, 'Value of <code>b</code> should be 8, after swapping.');
   - text: Use array destructuring to swap a and b.
-    testString: // assert(/\[\s*(\w)\s*,\s*(\w)\s*\]\s*=\s*\[\s*\2\s*,\s*\1\s*\]/g.test(code), 'Use array destructuring to swap a and b.');
+    testString: 'assert(/\[\s*(\w)\s*,\s*(\w)\s*\]\s*=\s*\[\s*\2\s*,\s*\1\s*\]/g.test(code), "Use array destructuring to swap a and b.");'
 
 ```
 
@@ -63,6 +63,14 @@ console.log(b); // should be 8
 <section id='solution'>
 
 ```js
-// solution required
+let a = 8, b = 6;
+(() => {
+  "use strict";
+  // change code below this line
+  [a, b] = [b, a];
+  // change code above this line
+})();
+console.log(a); // should be 6
+console.log(b); // should be 8
 ```
 </section>