doc: update CHANGELOG.md

Author: StrangeRanger

hardening/SSHD Hardening/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).
+
+## v1.1.3 - 2024-04-13
+
+Due to the poor maintenance of this repository, the changelog has not been updated as frequently as it should have been. The changes listed below are only the most recent changes.
+
+### Changed
+
+- Improved documentation of code.
+
+## v1.0.5 - 2022-07-13
+
+### Changed
+
+- Changed how the variables used to change the color of output text, are formatted, in the hopes of increasing portability.
+- Exit codes beyond 1, were reverted back to 1.
+
+## v1.0.4 - 2022-07-10
+
+### Changed
+
+- Modified exit codes.
+
+## v1.0.3 - 2020-12-01
+
+### Changed
+
+- Changed some of the output text.
+
+### Fixed
+
+- Added missing variable to `echo`, resulting in the text color to remain cyan.
+
+## v1.0.2 - N/A
+
+### Added
+
+- Added error catching when attempting to download lynis
+
+### Fixed
+
+- Fixed mistyped environmental variable from 'USER_SUDO' to 'SUDO_USER'
+
+## v1.0.1 - N/A
+
+### Added
+
+- Now prompts the user before performing actions
+
+### Fixed
+
+- Fixed script not wanting to run as root
+
+## v1.0.0 - N/A
+
+- Initial creation