Fix CubePDF readme

Author: clown

Applications/Converter/Readme.ja.md

@@ -54,6 +54,7 @@ CubePDF は、以下のライブラリを利用しています。
 
 * 2025-06-11 version 4.3.2
     - Ghostscript 10.5.1 に更新
+    - iText 9.2.0 に更新
 * 2025-04-08 version 4.3.1
     - Ghostscript 10.5.0 に更新
     - iText 9.1.0 に更新

Applications/Converter/Readme.md

@@ -55,6 +55,7 @@ Dependencies of the CubePDF are as follows.
 
 * 2025-06-11 version 4.3.2
     - Update Ghostscript to 10.5.1.
+    - Update iText to 9.2.0.
 * 2025-04-08 version 4.3.1
     - Update Ghostscript to 10.5.0.
     - Update iText to 9.1.0.