Update changelog

Author: vlad-perevezentsev

CHANGELOG.md

@@ -31,6 +31,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Replaced the use of `numpy.testing.suppress_warnings` with appropriate calls from the warnings module [#2529](https://github.com/IntelPython/dpnp/pull/2529)
 * Improved documentations of `dpnp.ndarray` class and added a page with description of supported constants [#2422](https://github.com/IntelPython/dpnp/pull/2422)
 * Updated `dpnp.size` to accept tuple of ints for `axes` argument [#2536](https://github.com/IntelPython/dpnp/pull/2536)
+* Improved performance of `dpnp.isclose` function by implementing a dedicated kernel for scalar `rtol` and `atol` arguments [#2540](https://github.com/IntelPython/dpnp/pull/2540)
 
 ### Deprecated