fix(curriculum): add missing infos in permutations lab user stories (#66034)

curriculum/challenges/english/blocks/lab-permutation-generator/66fe4f33a2cc9b33f4d5cd9b.md

@@ -22,7 +22,7 @@ This continues until the prefix has all the letters, and the rest of the string
 **User Stories:**
 
 1. You should create a function named `permuteString`.
-2. The `permuteString` function should take three parameters: a string, a prefix value and an empty array for storing and returning the results. The prefix value should be a string used to accumulate characters to form a permutation.
+2. The `permuteString` function should take one parameter, a string, and then two parameters with a default value: a prefix value and an empty array for storing and returning the results. The prefix value should be a string used to accumulate characters to form a permutation. The function will be called with one single argument, like `permuteString("cat")`.
 3. Inside the function, you should check if the length of the passed string is `0`. If it is, push the current prefix to the results and return the results.
 4. Iterate over each character in the input string and for each iteration, remove the current character from the string and call the `permuteString` function recursively with updated arguments to build the remaining permutations.
 5. You should return the final results array.