Restore CHANGELOG to support v1.0.0 release

Signed-off-by: lelia <[email protected]>

CHANGELOG.md

@@ -0,0 +1,24 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### TBA
+
+## [1.0.0] - 2024-02-16
+
+### Added
+
+- Add initial workflow for calling reusable workflow by @lelia in #3
+- README: Fix maintainer reference by @GaryPWhite in #1
+- .github: Add Scorecard workflow by @lelia in #10
+- .github: Add Dependabot configuration by @openclarity-service in #11
+- Deprecate Renovate and fix GitHub URL refs by @lelia in #14
+- Bump actions/checkout from 3.6.0 to 4.1.1 by @dependabot in #15
+
+[unreleased]: https://github.com/wayfair-incubator/oss-template/compare/v1.0.0...HEAD
+[1.0.0]: https://github.com/cisco-ospo/oss-template/releases/tag/v1.0.0