The changelog is in the navigation bar now, and every release has a card of its own — so a link you paste shows the release instead of the homepage.
Where the changelog went
The changelog was in the footer, which is where a link goes when nobody is thinking about it. It is now in the navigation bar, between the questions people ask and the developers page, because the people who want to know what shipped are the people who will look for it there.
A card for every release
When you paste a link to a release into a chat, the preview used to be a picture of the home page. That tells a reader nothing about what they are about to read. Every release now draws a card of its own: the title of the release, the day it shipped, and the first lines of what it says, in the same colours and the same shape as the rest of the site. It is drawn from the release itself, so a release that is corrected gets a corrected card — and a release published tomorrow gets one too, without the site being rebuilt. The changelog itself has a card as well, carrying the newest release.
What a crawler sees
Every changelog address now has a document of its own, written at build time: the title of the release, its description, its permanent address, the card, and the notes themselves in readable HTML. That matters for more than search engines. A link preview is made from the document, before any of the page runs, so without this the preview had nothing to show. Now the preview, the crawler and the reader all get the same release. The permanent addresses do not change. A release you have linked to before still resolves to the same place, with the same card.