Update Readme.txt

# Conflicts:
#	src/main/java/com/example/demo/DemoApplication.java

Readme.txt

@@ -1 +1,3 @@
-zadanie 2.3
+//zadanie 3
+
+//zadanie 4 new_feature

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

@@ -14,7 +14,7 @@ public class DemoApplication {
 		System.out.println("Start application 2");
 		System.out.println("Start application develop_3");
 		System.out.println("Start application develop_4");
-		SpringApplication.run(DemoApplicationExtra.class, args);
+		SpringApplication.run(DemoApplication.class, args);
 
 		System.out.println(new Date());
 	}