chore: update changelog

Author: vaind

CHANGELOG.md

@@ -12,6 +12,7 @@
 - Deduplicate profiling stack frames ([#3941](https://github.com/getsentry/sentry-dotnet/pull/3941))
 - OperatingSystem will now return macOS as OS name instead of 'Darwin' as well as the proper version. ([#2710](https://github.com/getsentry/sentry-dotnet/pull/3956))
 - Ignore null value on CocoaScopeObserver.SetTag ([#3948](https://github.com/getsentry/sentry-dotnet/pull/3948))
+- Unknown stack frames in profiles on .NET 8+ ([#3967](https://github.com/getsentry/sentry-dotnet/pull/3967))
 
 ## 5.1.0