minor corrections (RULES.md)

Author: dedece35

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - update developers list + update maven plugins versions
+- correction of RULES.md file (renaming ECxx rules to GCIxx rules + reformating arrays)
 
 ### Deleted