fix(curriculum): update Redux store listener to not allow direct calls (#56625)

Co-authored-by: Lasse Jørgensen <28780271+lasjorg@users.noreply.github.com>

curriculum/challenges/english/03-front-end-development-libraries/redux/register-a-store-listener.md

@@ -32,19 +32,25 @@ assert(
 There should be a listener function subscribed to the store using `store.subscribe`.
 
 ```js
-(getUserInput) => assert(getUserInput('index').match(/store\s*\.\s*subscribe\(/gm));
+assert.match(code, /store\s*\.\s*subscribe\(/gm);
 ```
 
 The `store.subscribe` should receive a function.
 
 ```js
-(getUserInput) => assert(getUserInput('index').match(/(\s*function\s*)|(\s*\(\s*\)\s*=>)/gm)) 
+assert.match(code, /(\s*function\s*)|(\s*\(\s*\)\s*=>)/gm);
+```
+
+The function passed to `store.subscribe` should not be called.
+
+```js
+assert.notMatch(code, /store\.subscribe\(.+\(\)\)/);
 ```
 
 The callback to `store.subscribe` should also increment the global `count` variable as the store is updated.
 
 ```js
-assert(store.getState() === count);
+assert.strictEqual(store.getState(), count);
 ```
 
 # --seed--