`www.neovim.io`, unlike bare `neovim.io`, doesn't have a matching cert

[acid-bong]

I'm using Librewolf, and it detects mismatches in the cert for the www subdomain:

The cert seems to only be configured for Github-based domain names.

Some sources (like Nixpkgs) link to https://www.neovim.io instead of https://neovim.io, hence the discovery.

[justinmk]

www.neovim.io redirects to https://neovim.io/ , why does this matter ?