Update CHANGELOG.v2.alpha.md

Author: moelasmar

CHANGELOG.v2.alpha.md

@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
-### [2.174.1-alpha.0](https://github.com/aws/aws-cdk/compare/v2.174.0-alpha.0...v2.174.1-alpha.0) (2025-01-07)
+## [2.174.1-alpha.0](https://github.com/aws/aws-cdk/compare/v2.174.0-alpha.0...v2.174.1-alpha.0) (2025-01-07)
 
 ## [2.174.0-alpha.0](https://github.com/aws/aws-cdk/compare/v2.173.4-alpha.0...v2.174.0-alpha.0) (2025-01-04)