[css-images-4][editorial] Start new changes section

Author: svgeesus

css-images-4/Overview.bs

@@ -3001,6 +3001,13 @@ Note: No change from [[css-images-3]].
 Changes {#changes}
 ==================
 
+<h3 class="no-num" id="changes-20250930">
+Changes Since the <a href="https://www.w3.org/TR/2025/WD-css-images-4-20250930/">30 September 2025</a> Working Draft</h3>
+
+<ul>
+	<li>(none)</li>
+</ul>
+
 <h3 class="no-num" id="changes-20230217">
 Changes Since the <a href="https://www.w3.org/TR/2023/WD-css-images-4-20230217/">17 February 2023</a> Working Draft</h3>