chore: update changelog for version 1.3.0 to reflect default branch detection fix

Author: CasperKristiansson

CHANGELOG.md

@@ -8,12 +8,15 @@ The project follows [Semantic Versioning](https://semver.org/) and adheres to th
 
 - Nothing yet.
 
+## [1.3.0] - 2025-10-10
+
+- Detect the default branch correctly even when `GITHUB_BASE_REF` is present but empty in scheduled workflows.
+
 ## [1.2.0] - 2025-10-10
 
 ### Fixed
 
 - Allow default runs to create pull requests again instead of always behaving like a dry-run.
-- Detect the default branch correctly even when `GITHUB_BASE_REF` is present but empty in scheduled workflows.
 
 ## [1.1.0] - 2025-10-10