Merge pull request 'Update demo/Readme.txt' (#1) from szumik/Demo:master into master

Reviewed-on: Hubi0295/Demo#1

demo/src/main/java/com/example/demo/DemoApplication.java

@@ -14,6 +14,7 @@ public class DemoApplication {
         System.out.println("Tutaj dokonalem zmian");
         System.out.println("Tutaj komunikat");
         System.out.println(new Date());
+        System.out.println("Zmiana u mnie");
 	}
 
 }