chore: set app.country to BR in App bootstrap

Author: otaviojava

src/main/java/com/otavio/jakarta/cdi/app/configuration/App.java

@@ -3,7 +3,7 @@
 public class App {
 
     public static void main(String[] args) {
-        System.setProperty("app.country", "PT");
+        System.setProperty("app.country", "BR");
         try (var container = jakarta.enterprise.inject.se.SeContainerInitializer.newInstance().initialize()) {
             TaxCalculator taxCalculator = container.select(TaxCalculator.class).get();
             System.out.println("Tax for 100: " + taxCalculator.calculate(new java.math.BigDecimal("100")));