Synchronize manual with stubs for PHP 8.4 - part 3 (#4179)

* Synchronize manual with stubs for PHP 8.4 - part 3

* Remove duplicated description

* Fix property IDs

Author: kocsismate

language/predefined/php-incomplete-class.xml

@@ -28,6 +28,7 @@
 
    <classsynopsis class="class">
     <ooclass>
+     <modifier>final</modifier>
      <classname>__PHP_Incomplete_Class</classname>
     </ooclass>
    </classsynopsis>
@@ -41,6 +42,28 @@
    </para>
   </section>
 
+  <section xml:id="php-incomplete-class.changelog" role="changelog">
+   &reftitle.changelog;
+   <informaltable>
+    <tgroup cols="2">
+     <thead>
+      <row>
+       <entry>&Version;</entry>
+       <entry>&Description;</entry>
+      </row>
+     </thead>
+     <tbody>
+      <row>
+       <entry>8.0.0</entry>
+       <entry>
+        This class is now <literal>final</literal>.
+       </entry>
+      </row>
+     </tbody>
+    </tgroup>
+   </informaltable>
+  </section>
+
   <section xml:id="php-incomplete-class.examples" role="examples">
    &reftitle.examples;
    <example xml:id="php-incomplete-class.basic-example">