Need to highlight changed EMAIL_USE_TLS better

[hmpf]

EMAIL_USE_TLS's default was changed from True to False in base, and it has in at least one case prevented notification emails from being sent.

prod-settings import from spa settings and defaults to EMAIL_USE_TLS=True. htmx-settings does not have a prod-version as of yet.

• [x] Make a new release:
  • [x] With the heads up about the change. Just a change in readme and changelog AND NOTES.
  • [x] Switch prod-version to use htmx settings
• [ ] #1401
• [ ] #1398

[hmpf]

New release 1.36.1 covers first task.