8326351: Update the Zlib version in open/src/java.base/share/legal/zlib.md to 1.3.1

Reviewed-by: lancea

Author: Ravi Reddy

src/java.base/share/legal/zlib.md

@@ -1,9 +1,9 @@
-## zlib v1.3
+## zlib v1.3.1
 
 ### zlib License
 <pre>
 
-Copyright (C) 1995-2023 Jean-loup Gailly and Mark Adler
+Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
 
 This software is provided 'as-is', without any express or implied
 warranty.  In no event will the authors be held liable for any damages