Update changelog

Author: tomas-novotny

CHANGELOG.md

@@ -7,5 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 
 ## [Unreleased](https://github.com/inspirum/balikobot-php-symfony/compare/v1.0.0...master)
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+## v1.0.0 (2022-08-19)
 ### Added
 - Support [`inspirum/balikobot`](https://github.com/inspirum/balikobot-php) `^7.0` for Symfony `^6.1`