Announce SciPy 1.15.3 (#646)

Author: tylerjereddy

content/en/news.md

@@ -1,10 +1,14 @@
 ---
 title: News
 sidebar: false
-newsHeader: SciPy 1.15.2 released!
-date: 2025-02-16
+newsHeader: SciPy 1.15.3 released!
+date: 2025-05-08
 ---
 
+### SciPy 1.15.3 released
+
+_May 8, 2025_ -- SciPy 1.15.3 has been released!
+
 ### SciPy 1.15.2 released
 
 _February 16, 2025_ -- SciPy 1.15.2 has been released!
@@ -227,6 +231,7 @@ Here is a list of SciPy releases, with links to release notes. Bugfix
 releases (only the `z` changes in the `x.y.z` version number) have no new
 features; minor releases (the `y` increases) do.
 
+- SciPy 1.15.3 ([release notes](https://github.com/scipy/scipy/releases/tag/v1.15.3)) -- _2025-05-08_.
 - SciPy 1.15.2 ([release notes](https://github.com/scipy/scipy/releases/tag/v1.15.2)) -- _2025-02-16_.
 - SciPy 1.15.1 ([release notes](https://github.com/scipy/scipy/releases/tag/v1.15.1)) -- _2025-01-10_.
 - SciPy 1.15.0 ([release notes](https://github.com/scipy/scipy/releases/tag/v1.15.0)) -- _2025-01-03_.