prepared 6.3.3

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to the Solarium library 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).
 
-## [Unreleased]
+## [6.3.3]
 ### Changed
 - Spatial component distance type changed from int to float
 - Revert return type for Solarium\Component\QueryTrait::setQuery() from `self` to `QueryInterface` for backward compatibility with custom query classes that override this method