[css-images-4][editorial] Updates for /TR

Author: svgeesus

css-images-4/Overview.bs

@@ -1,6 +1,8 @@
 <pre class='metadata'>
 Title: CSS Images Module Level 4
 Status: WD
+Prepare for TR: yes
+Date: 2025-09-30
 Work Status: Exploring
 Shortname: css-images
 Level: 4
@@ -955,7 +957,7 @@ Combining images: the ''cross-fade()'' notation {#cross-fade-function}
 
 			The function represents an <a>invalid image</a>.
 
-			<div class='example' id='ex-invalid image'>
+			<div class='example' id='ex-invalid-image'>
 
 				For example, all of the following ''element()'' uses will result in a transparent background: