Update README.md

Author: lukasj

www/README.md

@@ -24,6 +24,12 @@ Jakarta Mail/JavaMail, is available [here](README-JakartaMail)
 
 # <a name="Latest_News"></a>Latest News
 
+## March 4, 2024 - Jakarta Mail 2.1.3 Final Release ##
+
+The 2.1.3 release is a bug fix release of the Jakarta Mail project
+in the 2.1.x line, and includes several bug fixes and enhancements.
+See [the changelog](docs/CHANGES.txt) for details.
+
 ## May 5, 2023 - Jakarta Mail 2.1.2 Final Release ##
 
 The 2.1.2 release is a bug fix release of the Jakarta Mail project