refactor: rename methods to French for consistency in the Sudoku application

app/src/main/java/sudoku/App.java

@@ -34,7 +34,7 @@ public class App {
         sudoku.getGrille().setCase(0, 7, Symbole.of(8));
         sudoku.getGrille().setCase(4, 8, Symbole.of(9));
 
-        sudoku.getGrille().createSquareBlocs();
+        sudoku.getGrille().creerBlocCarre();
 
         System.out.println("Sudoku :");
         System.out.println(sudoku.getGrille().toString());