Update source/whats-new.txt

Co-authored-by: Jordan Smith <[email protected]>

Author: mongoKart

source/whats-new.txt

@@ -68,7 +68,7 @@ The 3.0 driver release includes the following new features:
 - Adds support for the ``TimeOnly`` type, which represents a time value with no
   date component. This type is available in .NET 6 and later. To learn more about the
   ``TimeOnly`` type, see the
-  `DateOnly Struct. <https://learn.microsoft.com/en-us/dotnet/api/system.timeonly?view=net-6.0>`__
+  `TimeOnly Struct. <https://learn.microsoft.com/en-us/dotnet/api/system.timeonly?view=net-6.0>`__
   API reference page on MSDN.
 
 .. _csharp-version-2.28: