function moveTaskUp(index){
      if(index > 0) {
        const updatedTasks = [...tasks]
        [updatedTasks[index], updatedTasks[index-1]] = [updatedTasks[index-1], updatedTasks[index]]
        setTasks(updatedTasks);
      }
    }

===================================================================================================

  function moveTaskUp(index) {
    if (index > 0) {
      const updatedTasks = [...tasks];
      [updatedTasks[index], updatedTasks[index - 1]] = [updatedTasks[index - 1], updatedTasks[index]];
      setTasks(updatedTasks);
    }
  }