Update CHANGELOG.md

Author: jamescrosswell

CHANGELOG.md

@@ -13,6 +13,7 @@
   - Remove `IDisposable` from `SentryStructuredLogger`. Disposal is intended through the owning `IHub` instance ([#4424](https://github.com/getsentry/sentry-dotnet/pull/4424))
   - Ensure all buffered logs are sent to Sentry when the application terminates unexpectedly ([#4425](https://github.com/getsentry/sentry-dotnet/pull/4425))
   - `InvalidOperationException` potentially thrown during a race condition, especially in concurrent high-volume logging scenarios ([#4428](https://github.com/getsentry/sentry-dotnet/pull/4428))
+- Blocking calls are no longer treated as unhandled crashes ([#4458](https://github.com/getsentry/sentry-dotnet/pull/4458))
 
 ### Dependencies