Update README.md

Author: XceedBoucherS

README.md

@@ -176,6 +176,8 @@ A commercial license can be purchased at [Xceed](https://xceed.com).
 
 ## Release history
 
+* **January 22, 2024 v4.6.0 released with [7 bug fixes and improvements](../../wiki/Improvements-in-v4.6.0).**
+* * October 23, 2023, released v4.6.0 of the [Plus Edition](../../wiki/Xceed-Toolkit-Plus-for-WPF) released with [13 bug fixes and improvements](../../wiki/Improvements-in-v3.5.0#Plus460).
 * **August 15, 2023 v4.5.1 released with [9 bug fixes and improvements](../../wiki/Improvements-in-v4.5.1).**
 * April 3, 2023, released v4.5.1 of the [Plus Edition](../../wiki/Xceed-Toolkit-Plus-for-WPF) released with [19 bug fixes and improvements](../../wiki/Improvements-in-v3.5.0#Plus451).
 * **November 25, 2022 v4.5.0 released with [18 bug fixes and improvements](../../wiki/Improvements-in-v4.5.0).**