Fix missing changelog entry for PyArray::borrow_from_array.

Author: adamreichold

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 - Unreleased
   - Support object arrays ([#216](https://github.com/PyO3/rust-numpy/pull/216))
+  - Support borrowing arrays that are part of other Python objects via `PyArray::borrow_from_array` ([#230](https://github.com/PyO3/rust-numpy/pull/216))
   - `PyArray::new` is now `unsafe`, as it produces uninitialized arrays ([#220](https://github.com/PyO3/rust-numpy/pull/220))
   - Fix thread-safety in internal API globals ([#222](https://github.com/PyO3/rust-numpy/pull/222))
   - Make arrays produced via `IntoPyArray`, i.e. those owning Rust data, writeable ([#235](https://github.com/PyO3/rust-numpy/pull/235))