Bug Report for https://neetcode.io/problems/find-duplicate-integer

Please describe the bug below and include any steps to reproduce the bug or screenshots if possible.

It is not a bug but rather a bad test case given definition of this task

Task:
You are given an array of integers nums containing n + 1 integers. Each integer in nums is in the range [1, n] inclusive.

Every integer appears exactly once, except for one integer which appears two or more times. Return the integer that appears more than once.

Issue:
Every integer in the range [1, n] appears exactly once, but I got a test case [3,3,3,3,3] which violates the problem statement.