refactor: simplify lambda parameter in CharactersCountView

Enable unused lambda parameter check

Author: durimkryeziu

characters-count/src/main/java/dev/delivercraft/charscnt/gui/CharactersCountView.java

@@ -40,6 +40,6 @@ private void createView() {
     private void bindViewModel() {
         this.inputTextField.textProperty().bindBidirectional(this.viewModel.inputProperty());
         this.outputLabel.textProperty().bind(this.viewModel.outputProperty());
-        this.viewModel.inputProperty().addListener((obs, ov, nv) -> this.viewModel.countInputCharacters());
+        this.viewModel.inputProperty().addListener((_, _, _) -> this.viewModel.countInputCharacters());
     }
 }

config/checkstyle/checkstyle.xml

@@ -141,7 +141,7 @@
         <module name="UnusedImports">
             <property name="processJavadoc" value="false"/>
         </module>
-        <!-- Enable on Java 25: <module name="UnusedLambdaParameterShouldBeUnnamed"/>-->
+        <module name="UnusedLambdaParameterShouldBeUnnamed"/>
         <module name="UnusedLocalVariable"/>
         <module name="UpperEll"/>
         <module name="VariableDeclarationUsageDistance"/>