imagecopyresampled: Add missing 8.5.0 changelog entry for return type (#5291)

* Fix imagecopyresampled return type: bool -> true

Since PHP 8.2, imagecopyresampled() always returns true instead of bool.
Update methodsynopsis, return value description, and add changelog entry.

* Use explicit 8.5.0 changelog row (imagecopyresampled return type changed in 8.5)

Author: lacatoire

reference/image/functions/imagecopyresampled.xml

@@ -142,6 +142,12 @@
      </row>
     </thead>
     <tbody>
+     <row>
+      <entry>8.5.0</entry>
+      <entry>
+       The return type is &true; now; previously, it was <type>bool</type>.
+      </entry>
+     </row>
      <row>
       <entry>8.0.0</entry>
       <entry>