Upgrade the samples to Spring Boot 2.4.x

Closes gh-723

samples/rest-notes-spring-hateoas/src/main/java/com/example/notes/Note.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014 the original author or authors.
+ * Copyright 2014-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,8 +24,6 @@ import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.ManyToMany;
 
-import com.fasterxml.jackson.annotation.JsonIgnore;
-
 @Entity
 public class Note {
 
@@ -40,7 +38,6 @@ public class Note {
 	@ManyToMany
 	private List<Tag> tags;
 
-	@JsonIgnore
 	public long getId() {
 		return id;
 	}
@@ -65,7 +62,6 @@ public class Note {
 		this.body = body;
 	}
 
-	@JsonIgnore
 	public List<Tag> getTags() {
 		return tags;
 	}
@@ -73,4 +69,5 @@ public class Note {
 	public void setTags(List<Tag> tags) {
 		this.tags = tags;
 	}
+
 }