Update changelog in readme.txt

Author: opr

readme.txt

@@ -85,12 +85,16 @@ Release and roadmap notes available on the [WooCommerce Developers Blog](https:/
 
 == Changelog ==
 
-== 5.9.0 - 2021-09-13 =
+== 5.9.0 - 2021-09-14 =
 
 #### Enhancements
 
 - Add extensibility point for extensions to filter payment methods. ([4668](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4668))
 
+#### Bug Fixes
+
+- Fix Product Search block displaying incorrectly ([4740](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4740))
+
 
 = 5.8.0 - 2021-08-31 =