Update release date for v5.1.0 in README.md

Author: XceedBoucherS

README.md

@@ -8,7 +8,7 @@ Starting at v4.0.0, this free toolkit is provided under the [Xceed Community Lic
 
 ## Latest news
 
-**June 22, 2026** v5.1.0 released with [12 bug fixes and improvements](../../wiki/Improvements-in-v5.1.0). 
+**June 11, 2026** v5.1.0 released with [12 bug fixes and improvements](../../wiki/Improvements-in-v5.1.0). 
 
 *March 16, 2026* v5.1.0 ServiceRelease of the [Plus Edition](../../wiki/Xceed-Toolkit-Plus-for-WPF) released with [5 bug fixes and improvements](../../wiki/Improvements-in-v3.5.0#Plus510)
 
@@ -177,7 +177,7 @@ A commercial license can be purchased at [Xceed](https://xceed.com).
 
 ## Release history
 
-* **June 22, 2026 v5.1.0 released with [12 bug fixes and improvements](../../wiki/Improvements-in-v5.1.0).**
+* **June 11, 2026 v5.1.0 released with [12 bug fixes and improvements](../../wiki/Improvements-in-v5.1.0).**
 * March 16, 2026, released v5.1.0 Service Release of the [Plus Edition](../../wiki/Xceed-Toolkit-Plus-for-WPF) released with [5 bug fixes and improvements](../../wiki/Improvements-in-v3.5.0#Plus510).
 * September 9, 2025, released v5.1.0 of the [Plus Edition](../../wiki/Xceed-Toolkit-Plus-for-WPF) released with [22 bug fixes and improvements](../../wiki/Improvements-in-v3.5.0#Plus510).
 * **September 9, 2025 v5.0.0 released with [3 bug fixes and improvements](../../wiki/Improvements-in-v5.0.0).**