Update CHANGELOG.md

Co-authored-by: Tim Ruffing <dev@real-or-random.org>

Author: jonasnick

CHANGELOG.md

@@ -8,20 +8,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 #### Added
- - CMake: Added `secp256k1_objs` interface library to allow parent projects to embed secp256k1 object files into their own static libraries.
+ - CMake: Added `secp256k1_objs` interface library to allow parent projects to embed libsecp256k1 object files into their own static libraries.
 
 #### Changed
  - The pointers `secp256k1_context_static` and `secp256k1_context_no_precomp` to the constant context object are now const.
- - Removed `SECP256K1_WARN_UNUSED_RESULT` attribute from several functions that always return 1. Compilers will no longer warn if the return value is unused.
- - The minimum required CMake version was increased to 3.22.
- - Building with CMake is no longer considered experimental.
- - Shared libraries built with CMake on FreeBSD now create the full versioned filename and symlink chain, matching the behavior of autotools builds.
+ - Removed `SECP256K1_WARN_UNUSED_RESULT` attribute (defined as `__attribute__ ((__warn_unused_result__))`) from several API functions that always return 1. Compilers will no longer warn if the return value is unused.
+ - CMake: Building with CMake is no longer considered experimental.
+ - CMake: The minimum required CMake version was increased to 3.22.
+ - CMake: Shared libraries built with CMake on FreeBSD now create the full versioned filename and symlink chain, matching the behavior of autotools builds.
 
 #### Removed
 - Removed previously deprecated function aliases `secp256k1_ec_privkey_negate`, `secp256k1_ec_privkey_tweak_add` and
   `secp256k1_ec_privkey_tweak_mul`. Use `secp256k1_ec_seckey_negate`, `secp256k1_ec_seckey_tweak_add` and
   `secp256k1_ec_seckey_tweak_mul` instead.
 
+#### ABI Compatibility
+The symbols `secp256k1_ec_privkey_negate`, `secp256k1_ec_privkey_tweak_add`, and `secp256k1_ec_privkey_tweak_mul` were removed.
+The pointers `secp256k1_context_static` and `secp256k1_context_no_precomp` have been made const.
+Otherwise, the library maintains backward compatibility with version 0.6.0.
+
 ## [0.6.0] - 2024-11-04
 
 #### Added