Update CHANGELOG.md for azure-resourcemanager 2.61.0 release

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: XiaofeiCao

sdk/resourcemanager/azure-resourcemanager/CHANGELOG.md

@@ -1,14 +1,6 @@
 # Release History
 
-## 2.61.0-beta.1 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
+## 2.61.0 (2026-04-03)
 
 ### azure-resourcemanager-containerservice
 
@@ -25,6 +17,12 @@
 
 - Updated `api-version` of policy to `2025-03-01`.
 
+### Other Changes
+
+#### Dependency Updates
+
+- Updated core dependency from resources.
+
 ## 2.60.0 (2026-02-26)
 
 ### azure-resourcemanager-network