release: v1.2.1 with updated changelog (#156)

Author: jonathanpwang

CHANGELOG.md

@@ -4,7 +4,12 @@ All notable changes to STARK Backend will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
-## [Unreleased]
+## v1.2.1 (2025-10-26)
+
+### Added
+- (CUDA common) New memory manager with Virtual Pool ([VPMM Spec](./docs/vpmm_spec.md)) with multi-stream support built on top of the CUDA Virtual Memory Management [driver API](https://docs.nvidia.com/cuda/cuda-driver-api/group__CUDA__VA.html)
 
 ### Changed
-- (CUDA) New memory manager with Virtual Pool ([VPMM Spec](./docs/vpmm_spec.md))
+- (CUDA common) Multi-arch build support
+- (CUDA backend) Quotient values kernel optimization
+- (CUDA backend) FRI reduced opening kernel optimization by removing bit reversal for better memory access patterns

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace.package]
-version = "1.2.1-rc.7"
+version = "1.2.1"
 edition = "2021"
 rust-version = "1.83"
 authors = ["OpenVM contributors"]