Why is Random.Range(0,3) generating only 0, 1 or 2 when 3 is supposed to be inclusive?

I'm currently having trouble getting my head around how Random.Range() and Array[].Length are working in the script below.

public class SpawnManager : MonoBehaviour
{
    public GameObject[] animalPrefabs;

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyUp(KeyCode.S))
        {
            int animalIndex = Random.Range(0, animalPrefabs.Length);
            Instantiate(animalPrefabs[animalIndex], new Vector3(0, 0, 20), animalPrefabs[animalIndex].transform.rotation);
        }
    }
}

Here, animalIndex is being assigned by Random.Range() a random number between 0 and the animalPrefabs[] array's length, which is 3. According to the documentation (both Visual Studio's and Unity's), both the minimum and maximum Random.Range() numbers are inclusive, which means Random.Range()'s possible outputs would amount to 4 numbers (0, 1, 2 and 3). However only 3 animalPrefabs[] (0, 1 and 2) are defined, as shown in the picture above.

Testing the script, however (printing Random.Range()'s outputs to the console), Random.Range() seems to be generating numbers from 0 to 2 only.

Is the documentation simply wrong? Otherwise, what's going on?