Update .chronus/changes/csharp-region-2025-9-13-16-38-9.md

Co-authored-by: Timothee Guerin <timothee.guerin@outlook.com>

Author: bterlson

.chronus/changes/csharp-region-2025-9-13-16-38-9.md

@@ -4,4 +4,4 @@ packages:
   - "@alloy-js/csharp"
 ---
 
-[c#] Add region support in csharp
+Add `#region` support