docs: update UUID

Signed-off-by: Otavio Santana <otaviopolianasantana@gmail.com>

spec/src/main/asciidoc/chapters/api/entity.adoc

@@ -102,16 +102,20 @@ For example, the following entity class has five basic fields:
 public class Person {
     @Id
     private UUID id;
+    @Column
     private String name;
+    @Column
     private long ssn;
+    @Column
     private LocalDate birthdate;
+    @Column
     private byte[] photo;
 }
 ----
 
 In addition to the types listed above, an entity programming model might support additional domain-specific basic types. This extended set of basic types might include types with a nontrivial internal structure. An entity programming model might even provide mechanisms to convert between user-written types and natively-supported basic types, defined at the `AttributeConverter` interface.
 
-NOTE: Many key-value, wide-column, document, and relational databases feature native support for arrays or even associative arrays of these basic types. Unfortunately, the semantics of such types--along with their performance characteristics--are extremely nonuniform, and so support for such types is left undefined by the Jakarta NoSQL specification.
+NOTE: Many key-value, wide-column, and document databases feature native support for arrays or even associative arrays of these basic types.
 
 ==== Embedded Fields and Embeddable Classes
 
@@ -142,16 +146,21 @@ For example, consider the following Java classes:
 ----
 @Embeddable
 public class Address {
+    @Column
     private String street;
+    @Column
     private String city;
+    @Column
     private String postalCode;
 }
 
 @Entity
 public class Person {
     @Id
     private Long id;
+    @Column
     private String name;
+    @Column
     private Address address;  // embedded field
 }
 ----
@@ -204,17 +213,38 @@ For example, consider the following Java classes:
 public class Author {
     @Id
     private UUID id;
+    @Column
     private String name;
+    @Column
     private List<Book> books;
 }
 
 @Entity
 public class Book {
-    @Id
-    private Long id;
+    @Column
     private String title;
+    @Column
     private String category;
-    private List<Author> authors;
+}
+----
+
+For example, the JSON representation of `Author` might be:
+
+[source,json]
+----
+{
+  "id": "550e8400-e29b-41d4-a716-446655440000",
+  "name": "John Smith",
+  "books": [
+    {
+      "title": "Java Programming",
+      "category": "Programming"
+    },
+    {
+      "title": "Introduction to NoSQL",
+      "category": "Database"
+    }
+  ]
 }
 ----