Prepare 3.16 release notes and announcement

[browniebroke]

Description

Add release notes and announcement from 3.16 release

• Add release notes generated from GitHub
• Reword and reformat entries
• Write announcements by picking more important changes
• Confirm release date

[carltongibson]

@browniebroke this looks great. Want to rebase it on #9672? encode:version-3.16

[carltongibson]

I like you've generated the full changelog and new contributors!

I think there's probably value in the intro highlights about the updated version support which was my take. What about having both WDYT?

[browniebroke]

I like you've generated the full changelog and new contributors!

That the default from GitHub when you draft a new release from https://github.com/encode/django-rest-framework/releases/new (although that might actually be from the refined GitHub browser extension)

[browniebroke]

I think there's probably value in the intro highlights about the updated version support which was my take. What about having both WDYT?

The generated version was just v0 and I was planning to do something along these lines. Let me know what you think of the v1.

I still need to reformat the links better so they look nice in the rendered docs... v2 incoming!

[carltongibson]

OK, I like this one. Let's use this instead of #9672.

You can bump the version number too, please.

[carltongibson]

Yep, lovely. Thanks for the great work @browniebroke 🥇

[auvipy]

yea!