Bitcoin Core version 27.0 is now available from:
https://bitcoincore.org/bin/bitcoin-core-27.0/
For the release notes please see the git repository:
https://github.com/bitcoin/bitcoin/blob/master/doc/release-notes/release-notes-27.0.md
Do not use the links provided by GitHub, rather use the above download links, they are guaranteed to be generated deterministically and signed.