Update change wave md

documentation/wiki/ChangeWaves.md

@@ -25,6 +25,7 @@ A wave of features is set to "rotate out" (i.e. become standard functionality) t
 
 ### 17.10
 - [AppDomain configuration is serialized without using BinFmt](https://github.com/dotnet/msbuild/pull/9320) - feature can be opted out only if [BinaryFormatter](https://learn.microsoft.com/en-us/dotnet/api/system.runtime.serialization.formatters.binary.binaryformatter) is allowed at runtime by editing `MSBuild.runtimeconfig.json`
+- [Warning on serialization custom events in by default in .NET framework](https://github.com/dotnet/msbuild/pull/9318)
 
 ### 17.8
 - [[RAR] Don't do I/O on SDK-provided references](https://github.com/dotnet/msbuild/pull/8688)