Add release notes entry for version 4.5.2-pre.0

Co-authored-by: dandrejvv <[email protected]>

Author: Copilot

Modules/Intent.Modules.Application.MediatR/release-notes.md

@@ -1,3 +1,7 @@
+### Version 4.5.2-pre.0
+
+- Improvement: Updated projectUrl to reference external documentation instead of local README.
+
 ### Version 4.5.1
 
 - Improvement: Detects existence and name of `CancellationToken` parameter before adding to the `Send` invocation.