update release notes

release-notes.md

@@ -1,11 +1,3 @@
 ## Intro:
-Highlights of this new release:
-
-- Added $process-message operation support  in the FHIR client. 
-- Changes to the JsonSerializerOptions.
-- Updates dependencies to newest versions
-- Some minor fixes to the terminology services and the source node comparator
-
-Note: From now on due to changes on the JsonSerializerOptions, inputted parameters are changed instead of returning a new instance to support service initialization better.
-This change results in the fact that you cannot alter JsonSerializer options anymore after serializer or deserialization has occured.
-This applies to the ForFhir(), Pretty(), and Compact() functionality.
+Hotfix release.
+This release solves a race condition that occurred when expanding ValueSets using the LocalTerminologyService.