fix(curriculum): test that contacts array is not modified in lab profile lookup (#65032)

Co-authored-by: Krzysztof G. <60067306+gikf@users.noreply.github.com>

curriculum/challenges/english/blocks/lab-profile-lookup/5688e62ea601b2482ff8422b.md

@@ -24,7 +24,7 @@ For this example imagine there is a contact named Akira Laine, the `lookUpProfil
 # --before-each--
 
 ```js
-contacts = [
+const _contacts = [
   {
     firstName: "Akira",
     lastName: "Laine",
@@ -50,6 +50,8 @@ contacts = [
     likes: ["JavaScript", "Gaming", "Foxes"],
   },
 ];
+
+contacts = structuredClone(_contacts); 
 ```
 
 # --hints--
@@ -111,6 +113,13 @@ assert.strictEqual(lookUpProfile('Bob', 'potato'), 'No such contact');
 assert.strictEqual(lookUpProfile('Akira', 'address'), 'No such property');
 ```
 
+The `contacts` array should remain unchanged after running `lookUpProfile` 
+
+```js
+lookUpProfile("Sherlock", "likes");
+assert.deepEqual(contacts,_contacts);
+```
+
 # --seed--
 
 ## --seed-contents--