Update CHANGELOG.md (#658)

## Type of change

- [ ] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [x] Other

## Objective

Update changelog to mention the `bws` Docker image

---------

Co-authored-by: Oscar Hinton <Hinton@users.noreply.github.com>

crates/bws/CHANGELOG.md

@@ -7,10 +7,20 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
-### Changed
+### Added
 
-- Switched TLS backend to `rustls`, removing the dependency on `OpenSSL`.
 - Add a `BWS_CONFIG_FILE` environment variable to specify the location of the config file (#571)
+- The `bws` CLI is now available as a Docker image (`docker run -it bitwarden/bws --help`) (#305)
+- The `bws` CLI releases are now code signed on Windows and Mac (#534, #535)
+
+### Fixed
+
+- Re-add output options to the help menu after they were accidentally removed (#477)
+
+### Changed
+
+- Switched TLS backend to `rusttls`, removing the dependency on `OpenSSL` (#374)
+- Updated MSRV for `bws` to `1.71.0` (#589)
 
 ## [0.4.0] - 2023-12-21