Update changelog

Author: mattiapenati

CHANGELOG.md

@@ -1,7 +1,8 @@
 # Changelog
 
 - Unreleased
-  - Fix PyArray_DTypeMeta definition when Py_LIMITED_API is disabled (#532)
+  - Fix PyArray_DTypeMeta definition when Py_LIMITED_API is disabled ([#532](https://github.com/PyO3/rust-numpy/pull/532))
+  - The NumPy C API binding has been updated to target the ABI v2, while maintaining runtime compatibility with NumPy v1 targeting the API v1.15. The higher interface is unchanged. ([#537](https://github.com/PyO3/rust-numpy/pull/537))
 
 - v0.28.0
   - Fix mismatched behavior between `PyArrayLike1` and `PyArrayLike2` when used with floats ([#520](https://github.com/PyO3/rust-numpy/pull/520))