Updating CHANGELOG entry

Author: Ivan De Marino

.changelog/42.txt

@@ -1,3 +1,7 @@
 ```release-note:feature
-Introduced `genericvalidator` package with 4 new validation functions: `OneOf()`, `NoneOf()`
+Introduced `genericvalidator` package with 2 new validation functions: `OneOf()`, `NoneOf()`
+```
+
+```release-note:enhancement
+stringvalidator: 2 new validation functions, `OneOf()` and `NoneOf()`, similar to the ones in `genericvalidator` but option to control case-sensitivity
 ```