Update release notes for 1.3.0

Author: zombiezen

CHANGELOG.md

@@ -5,9 +5,12 @@ 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).
 
-[Unreleased]: https://github.com/zombiezen/go-sqlite/compare/v1.2.0...main
+[Unreleased]: https://github.com/zombiezen/go-sqlite/compare/v1.3.0...main
 
-## [Unreleased][]
+## [1.3.0][] - 2024-05-04
+
+Version 1.3 is largely a bug-fix release,
+but is a minor version change because of the new `sqlitemigration.Pool.Take` method.
 
 ### Added