BR IENC catalog script needs update

[nohal]

After the recent redesign of https://www.marinha.mil.br/chm/dados-do-segnav/cartas-ienc?page=1 the script fails with

Traceback (most recent call last):
  File "/opt/chartcatalogs/scripts/./brasil_ienc.py", line 47, in <module>
    ProcessPage(catalog, 0)
  File "/opt/chartcatalogs/scripts/./brasil_ienc.py", line 33, in ProcessPage
    for row in table.find_all('tr'):
AttributeError: 'NoneType' object has no attribute 'find_all'