update changelog

Author: radubrehar

www/content/docs/releases/index.page.md

@@ -3,6 +3,12 @@ title: Releases
 description: All releases | Infinite Table DataGrid for React
 ---
 
+## 7.5.1
+
+Improve scrolling performance generally, by a lot, by doing async updates.
+
+For scrolling in a horizontal layout configuration, the scrolling flushes cells synchronously.
+
 ## 7.5.0
 
 Improve perf for data updates by 35% in certain scenarios.