Set up a toggle button using the Input Actions Manager

Set up a toggle button using the Input Actions Manager: derived from https://forum.unity.com/threads/new-input-system-how-to-use-the-hold-interaction.605587/

/**********************************************************************
USE THIS AS A DEFAULT WAY OF SETTING UP A TOGGLE!!!
***********************************************************************/ 

if (controls.Gameplay.crouch.triggered) 
{ isCrouching = !isCrouching; //toggle } 
//This will toggle 'crouch' on and off. Also make sure that the 
//controls.Gameplay.crouch.performed/cancelled IS NOT called in 
//Awake()