docs: revert to Unreleased

I will update to minor version later.

Author: mu-hun

CHANGELOG.md

@@ -5,7 +5,7 @@ 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).
 
-## [v3.3.0] <!-- TODO: add release date -->
+## [Unreleased]
 
 ### Added
 
@@ -18,9 +18,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `getFilterOptimizationConfig` deduplicates concurrent `percent.json` fetches via promise singleton.
 - Updated [@adguard/filters-downloader] to v2.4.4.
 
-<!-- TODO: create new tag for v3.3.0 -->
-[v3.3.0]: https://github.com/AdguardTeam/FiltersCompiler/compare/v3.2.9...HEAD
-
 ## [v3.2.9] - 2026-04-21
 
 ### Changed