Since I didn't see the changes in the announcement, here is a copy pasted changelog from the NEWS file:

New in 2.14:

  * libgcrypt 1.11.
  * LVM LV integrity and cachevol support.
  * EROFS support.
  * GRUB environment block inside the Btrfs header support.
  * NX support for EFI platforms.
  * shim loader protocol support.
  * BLS and UKI support.
  * Argon2 KDF support.
  * TPM2 key protector support.
  * Appended Signature Secure Boot Support for PowerPC.
  * New option to block command line interface.
  * Support dates outside of 1901..2038 range.
  * zstdio decompression support.
  * EFI code improvements and fixes.
  * TPM driver fixes.
  * Filesystems fixes.
  * CVE and Coverity fixes.
  * Tests improvements.
  * Documentation improvements.
  * ... and tons of other fixes and cleanups...