Add note, just like contents.css.

ISHelp/Staging-dark/styles.css

@@ -1,8 +1,10 @@
 /*
   Inno Setup
-  Copyright (C) 1997-2010 Jordan Russell
+  Copyright (C) 1997-2024 Jordan Russell
   Portions by Martijn Laan
   For conditions of distribution and use, see LICENSE.TXT.
+
+	Style sheet used by topic_*.htm
 */
 
 BODY {

ISHelp/Staging/styles.css

@@ -1,8 +1,10 @@
 /*
   Inno Setup
-  Copyright (C) 1997-2010 Jordan Russell
+  Copyright (C) 1997-2024 Jordan Russell
   Portions by Martijn Laan
   For conditions of distribution and use, see LICENSE.TXT.
+
+	Style sheet used by topic_*.htm
 */
 
 BODY {