Add PR to the changelog

Author: antonwolfy

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Added `dpnp.ndarray.__contains__` method [#2534](https://github.com/IntelPython/dpnp/pull/2534)
 * Added implementation of `dpnp.linalg.lu_factor` (SciPy-compatible) [#2557](https://github.com/IntelPython/dpnp/pull/2557), [#2565](https://github.com/IntelPython/dpnp/pull/2565)
 * Added implementation of `dpnp.piecewise` [#2550](https://github.com/IntelPython/dpnp/pull/2550)
+* Added implementation of `dpnp.special.erfc` [#2588](https://github.com/IntelPython/dpnp/pull/2588)
 
 ### Changed