Log Message:
py-hyperkitty: update to 1.3.8

 - Make it compatible with elasticsearch 8.0.0
 - Removed unnecessary SESSION_SERIALIZER from settings.py.
 - Updated the contrib/check_hk_import script to catch more issues.
 - Update API Views to use LimitOffsetPagination as the default pagination
   style.
 - Added a new contrib/cleanarch3 script it check/fix mboxes for unescaped
   "From " lines and bad Date: headers.
 - Upgrade to Bootstrap 5 and the UI redesign.
 - Add support for Django 4.2
 - hyperkitty_import no longer fails with recent Python and Message-ID: <>
 - Add support to parse outlook style replies so they can be hidden inside
   a quote section like regular quoted replies.
 - Change color for 4th level quoted text.
 - Fixed an issue in hyperkitty_import in trying to apply .strip() to a
   email.header.Header object.