Update newsletter to store privacy policy

[marcoacierno]

• Add privacy policy checkbox for the newsletter ui
• Store privacy policy in newsletter

Why

How to test it

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated (UTC)
pycon	❌ Failed (Inspect)		Oct 4, 2024 11:47pm

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.08%. Comparing base (83bda6f) to head (a6fbd5e). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4105 +/- ## ======================================= Coverage 94.07% 94.08% ======================================= Files 333 333 Lines 9218 9228 +10 Branches 1350 1351 +1 ======================================= + Hits 8672 8682 +10 Misses 456 456 Partials 90 90 ```