update changelog for release 57 [no ci]

CHANGELOG.md

@@ -4,6 +4,8 @@ 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/).
 
 ## [Unreleased]
+
+## [0.0.57-alpha] - 2021-09-10
 ### Added
 - Add `released_inthelast` search field for relative release date queries
   - Syntax is a number and a unit (days, weeks, months, years) like `1 week` or `2 years`
@@ -578,7 +580,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Initial release to facilitate testing outside of Docker.
 
 
-[Unreleased]: https://github.com/jasongdove/ErsatzTV/compare/v0.0.56-alpha...HEAD
+[Unreleased]: https://github.com/jasongdove/ErsatzTV/compare/v0.0.57-alpha...HEAD
+[0.0.57-alpha]: https://github.com/jasongdove/ErsatzTV/compare/v0.0.56-alpha...v0.0.57-alpha
 [0.0.56-alpha]: https://github.com/jasongdove/ErsatzTV/compare/v0.0.55-alpha...v0.0.56-alpha
 [0.0.55-alpha]: https://github.com/jasongdove/ErsatzTV/compare/v0.0.54-alpha...v0.0.55-alpha
 [0.0.54-alpha]: https://github.com/jasongdove/ErsatzTV/compare/v0.0.53-alpha...v0.0.54-alpha