fix: change start directory when exporting jar

build.gradle

@@ -28,7 +28,7 @@ test {
 }
 
 application {
-    mainClass.set("seedu.duke.Duke")
+    mainClass.set("duke.Duke")
 }
 
 shadowJar {

src/main/java/duke/ui/UI.java

@@ -13,7 +13,7 @@ public void onEnter() {
     }
 
     public void showList(TaskList taskList) {
-        System.out.println("Here are the duke.tasks in your list:");
+        System.out.println("Here are the tasks in your list:");
         taskList.listTask();
     }
 
@@ -56,6 +56,6 @@ public void onExit() {
     }
 
     public void showTaskListCount(Integer count) {
-        System.out.println("Now you have "+ count +" duke.tasks in the list." );
+        System.out.println("Now you have "+ count +" tasks in the list." );
     }
 }