Update deprecation notice

[rod-glover]

Changes

Update deprecation notice with new date and hyperlinks.

Checklist

• [ ] Full integration tests are passing locally
• [x] Docs have been updated to reflect the changes

[rod-glover]

Deployed and verified that new message is present and uses valid URLs.

Since this is a trivial change (words of doom) that does not affect any of the integration tests, I am going to skip them. Ready to merge.