Bitcoin Core version 27.1 is now available from:

https://bitcoincore.org/bin/bitcoin-core-27.1/

For the release notes please see the git repository:

https://github.com/bitcoin/bitcoin/blob/master/doc/release-notes/release-notes-27.1.md

Do not use the links provided by GitHub, rather use the above download links, they are guaranteed to be generated deterministically and signed.