docs: add the junit-jupiter removal

Author: marcelogpinheiro

docs/RELEASE_NOTES.md

@@ -39,6 +39,9 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - 🛠️ **Dependency Updates** (1)
   - `com.commercetools:commercetools-sync-java` `10.4.0` -> [`10.5.0`](https://github.com/commercetools/commercetools-sync-java/releases/tag/10.5.0)
 
+- 🐞 **Bug Fixes** (1)
+  - Fixed test configuration by removing `junit-vintage` engine from JUnit Platform configuration, as the project only uses JUnit 5 (Jupiter).
+
 ---
 
 ### 5.1.2 - April 6, 2022