Update changelog for bug fixes

CHANGELOG.md

@@ -29,7 +29,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [1708](https://github.com/nf-core/sarek/pull/1708) - Migrate pipeline pytest alignment and annotation tests to nf-test
 
 ### Fixed
-
+- [1712](https://github.com/nf-core/sarek/pull/1712) - Fix missing import statements on error messages when starting without samplesheet
 - [1657](https://github.com/nf-core/sarek/pull/1657) - Update all actions used in the GHA CI
 - [1661](https://github.com/nf-core/sarek/pull/1661) - nf-test pipeline level tests
 - [1673](https://github.com/nf-core/sarek/pull/1673) - Print warning message instead of silent error with Nextflow versions prior to 24.08.0edge