fix: Changelog duplicate header (#133)

Author: Xyaren

CHANGELOG.md

@@ -23,10 +23,6 @@ All notable changes to this project will be documented in this file.
 
 * update CI/CD process to align auto-release workflow configs ([#118](https://github.com/terraform-aws-modules/terraform-aws-s3-bucket/issues/118)) ([31d76f9](https://github.com/terraform-aws-modules/terraform-aws-s3-bucket/commit/31d76f933b05848be9aaf25befd43966e4065472))
 
-# Changelog
-
-All notable changes to this project will be documented in this file
-
 ## [2.11.1](https://github.com/terraform-aws-modules/terraform-aws-s3-bucket/compare/v2.11.0...v2.11.1) (2021-11-07)