included_languages M2M table was never migrated when the Language id field was extended to 14 characters max length

[sentry]

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Sentry Issue: STUDIO-J2D

DataError: value too long for type character varying(7)

StringDataRightTruncation: value too long for type character varying(7)

  File "django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "django_prometheus/db/common.py", line 69, in execute
    return super().execute(*args, **kwargs)

DataError: value too long for type character varying(7)

(12 additional frame(s) were not displayed)
...
  File "contentcuration/viewsets/channel.py", line 524, in publish_from_changes
    self.publish(
  File "contentcuration/viewsets/channel.py", line 551, in publish
    channel = publish_channel(
  File "contentcuration/utils/publish.py", line 1025, in publish_channel
    fill_published_fields(channel, version_notes)
  File "contentcuration/utils/publish.py", line 904, in fill_published_fields
    channel.included_languages.add(lang)

[rtibbles]

Fixed in #5623