When including a link in a Bluesky post from the web UI, it automatically embeds a website card if one is available for the URL. It might be nice to have this for the post created by our post-release workflow. See https://docs.bsky.app/docs/advanced-guides/posts#website-card-embeds.
For an example of a post with an embedded website card for a GitHub link, see this: https://bsky.app/profile/tommyludwig.bsky.social/post/3loxgeahe6s26