Update CHANGELOG.md

Author: jamescrosswell

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Features
 
 - Implement process and instance isolation so that multiple instances of the Sentry SDK can be instantiated inside the same process when using the Caching Transport ([#4498](https://github.com/getsentry/sentry-dotnet/pull/4498))
+
 ### Fixes
 
 - Fail when building Blazor WASM with Profiling. We don't support profiling in Blazor WebAssembly projects. ([#4512](https://github.com/getsentry/sentry-dotnet/pull/4512))