announce the NumPy 2.1.1 release (#773)

Author: charris

content/en/news.md

@@ -426,6 +426,7 @@ Here is a list of NumPy 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.
 
+- NumPy 2.1.1 ([release notes](https://github.com/numpy/numpy/releases/tag/v2.1.1)) -- _3 Sep 2024_.
 - NumPy 2.0.2 ([release notes](https://github.com/numpy/numpy/releases/tag/v2.0.2)) -- _26 Aug 2024_.
 - NumPy 2.1.0 ([release notes](https://github.com/numpy/numpy/releases/tag/v2.1.0)) -- _18 Aug 2024_.
 - NumPy 2.0.1 ([release notes](https://github.com/numpy/numpy/releases/tag/v2.0.1)) -- _21 Jul 2024_.