Pin version of html2text

[evansd]

Newer versions choke when trying to reformat our email content and it doesn't seem worthwhile spending time to work out what the issue is.

This test demonstrates the issue:

SKIP_NPM_BUILD=True ./manage.py test --keepdb \
  frontend.tests.commands.test_send_all_england_alerts.CommandTestCase.test_send_alerts

The failure looks like this:

Traceback (most recent call last):
  File "/home/dave/projects/ebmdatalab/openprescribing/openprescribing/frontend/tests/commands/test_send_all_england_alerts.py", line 23, in test_send_alerts
    call_command("send_all_england_alerts")
  File "/home/dave/.virtualenvs/ebm-openprescribing/lib/python3.12/site-packages/django/core/management/__init__.py", line 194, in call_command
    return command.execute(*args, **defaults)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dave/.virtualenvs/ebm-openprescribing/lib/python3.12/site-packages/django/core/management/base.py", line 458, in execute
    output = self.handle(*args, **options)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dave/projects/ebmdatalab/openprescribing/openprescribing/frontend/management/commands/send_all_england_alerts.py", line 24, in handle
    send_alerts(recipient_email=recipient_email)
  File "/home/dave/projects/ebmdatalab/openprescribing/openprescribing/frontend/management/commands/send_all_england_alerts.py", line 43, in send_alerts
    error_deferrer.try_email(send_alert, bookmark, date)
  File "/home/dave/projects/ebmdatalab/openprescribing/openprescribing/common/alert_utils.py", line 39, in try_email
    return  callback(*args)
            ^^^^^^^^^^^^^^^
  File "/home/dave/projects/ebmdatalab/openprescribing/openprescribing/frontend/management/commands/send_all_england_alerts.py", line 73, in send_alert
    message = bookmark_utils.make_all_england_email(bookmark, tag=date)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dave/projects/ebmdatalab/openprescribing/openprescribing/frontend/views/bookmark_utils.py", line 917, in make_all_england_email
    finalise_email(
  File "/home/dave/projects/ebmdatalab/openprescribing/openprescribing/frontend/views/bookmark_utils.py", line 689, in finalise_email
    text = email_as_text(html)
           ^^^^^^^^^^^^^^^^^^^
  File "/home/dave/projects/ebmdatalab/openprescribing/openprescribing/common/utils.py", line 65, in email_as_text
    text = text_maker.handle(html)
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dave/.virtualenvs/ebm-openprescribing/lib/python3.12/site-packages/html2text/__init__.py", line 149, in handle
    return pad_tables_in_text(markdown)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dave/.virtualenvs/ebm-openprescribing/lib/python3.12/site-packages/html2text/utils.py", line 280, in pad_tables_in_text
    table = reformat_table(table_buffer, right_margin)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dave/.virtualenvs/ebm-openprescribing/lib/python3.12/site-packages/html2text/utils.py", line 229, in reformat_table
    max_width = [len(x.rstrip()) + right_margin for x in lines[0].split("|")]
                                                         ~~~~~^^^
IndexError: list index out of range

Here's the original Dependabot PR with links to the changelog:

• chore(deps): bump html2text from 2020.1.16 to 2024.2.26 #4677