two line import fix for get_layout_csv_from_trp2

[scott-norm]

The imports for t_pretty_print_layout.py:

import os
import warnings
import logging
from trp.trp2 import TDocument
from typing import List

Then line 262 expects t2:

relationships: t2.TRelationship = page.get_relationships_for_type()

The simplest fix (confirms this work locally) is to update the import to:

import trp.trp2 as t2

and then update line 241:

def get_layout_csv_from_trp2(trp2_doc: t2.TDocument) -> List[List[List[str]]]: