Add CHANGELOG for initial release

Author: msaipraneeth

CHANGELOG.md

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+# 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).
+
+## [0.67.2.1] - 2024-11-24
+
+### Added
+- Initial release of `trivy_py_ecc` (rebranded from `trivy-py`)
+- GitHub Actions workflow for automated PyPI publishing
+- Python wrapper for Trivy v0.67.2 binary
+- Support for multiple platforms:
+  - Linux: x86_64, ARM64, ARM
+  - macOS: ARM64 (Apple Silicon), x86_64 (Intel)
+  - Windows: x64
+- Pre-commit hooks: `trivy-fs` and `trivy-config`
+- Automatic binary download and installation
+
+### Changed
+- Package name: `trivy-py` → `trivy_py_ecc`
+- Maintainer: eccenca GmbH
+- Repository: https://github.com/eccenca/pre-commit-mirrors-trivy