fix confusion between circle radius and diameter

classic shite

src/main/java/ovh/gasser/newshapes/App.java

@@ -57,7 +57,7 @@ public class App {
                 SCollection.of(
                         SRectangle.create(100, 200, 40, 60, Color.MAGENTA),
                         SRectangle.create(150, 200, 40, 60, Color.MAGENTA),
-                        SCircle.create(200, 200, 60)
+                        SCircle.create(200, 250, 30)
                 )
         );
     }