update changelog for 0.7.0 (#211)

Author: nsidnev

CHANGELOG.md

@@ -5,9 +5,13 @@ 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).
 
-## [0.7.0] - Unreleased
+## Unreleased
 
-[Compare with 0.6.1](https://github.com/edgedb/edgedb-elixir/compare/v0.6.1...HEAD)
+[Compare with 0.7.0](https://github.com/edgedb/edgedb-elixir/compare/v0.7.0...HEAD)
+
+## [0.7.0] - 2024-05-05
+
+[Compare with 0.6.1](https://github.com/edgedb/edgedb-elixir/compare/v0.6.1...v0.7.0)
 
 ### Added