Update the changelog

Author: stakx

CHANGELOG.md

@@ -3,11 +3,12 @@
 ## Next
 
 Breaking Changes:
-- Updated target frameworks to .NET 8 (`net8.0`), .NET Standard 2.0 (`netstandard2.0`), and .NET Framework 4.6.2 (`net462`). Tests are being run on .NET 8, .NET 9, and on the .NET Framework. We no longer run tests on earlier frameworks nor on Mono. (@Romfos, #696)
+- Updated target frameworks to .NET 8 (`net8.0`), .NET 9.0 (`net9.0`), .NET Standard 2.0 (`netstandard2.0`), and .NET Framework 4.6.2 (`net462`). Tests are being run on .NET 8, .NET 9, and on the .NET Framework. We no longer run tests on earlier frameworks nor on Mono. (@Romfos, #696; @stakx, #718)
 - Moved `Castle.Core.Logging.DiagnosticsLogger` into a separate NuGet package `Castle.Core-DiagnosticsLogger`, which renders the main package dependency-free for .NET 8+ (@snakefoot, #694)
 
 Enhancements:
 - Minimally improved support for methods having `ref struct` parameter and return types, such as `Span<T>`: Intercepting such methods caused the runtime to throw `InvalidProgramException` and `NullReferenceException` due to forbidden conversions of `ref struct` values when transferring them into & out of `IInvocation` instances. To prevent these exceptions from being thrown, such values now get replaced with `null` in `IInvocation`, and with `default` values in return values and `out` arguments. When proceeding to a target, the target methods likewise receive such nullified values. (@stakx, #665)
+- Restore ability on .NET 9 and later to save dynamic assemblies to disk using `PersistentProxyBuilder` (@stakx, #718)
 - Dependencies were updated
 
 Bugfixes: