docs: update CHANGELOG.md for 1.1.1 [skip ci]

Author: davidecavestro

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).
+
+## [1.1.1] - 2024-06-13
+### :wrench: Chores
+- [`7609d4f`](https://github.com/davidecavestro/docker-gphotos-cdp/commit/7609d4f5f0ae99ea72d4d15e6ca2b8dbbbf0c27a) - code cleanup *(commit by [@davidecavestro](https://github.com/davidecavestro))*
+- [`3eed95a`](https://github.com/davidecavestro/docker-gphotos-cdp/commit/3eed95acfc0b4b09d47918b0fc12cdc8a5b37a88) - update changelog on release *(commit by [@davidecavestro](https://github.com/davidecavestro))*
+
+[1.1.1]: https://github.com/davidecavestro/docker-gphotos-cdp/compare/1.1.0...1.1.1