Update CHANGELOG.md

Co-authored-by: Emmanuel Mathot <emmanuel.mathot@gmail.com>

Author: m-mohr

CHANGELOG.md

@@ -8,7 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- Relation type `validation-report`
+- Relation type `processing-validation`
 
 ### Changed