Update messages diff link.

whatsnew.htm

@@ -39,7 +39,7 @@ For conditions of distribution and use, see <a href="https://jrsoftware.org/file
   </ul>
   </li>
   <li>Inno Setup Preprocessor (ISPP) change: Added new <tt>PackVersionComponents</tt>, <tt>UnpackVersionComponents</tt>, and <tt>ParseVersionPacked</tt> support functions.</li>
-  <li>Some messages have been added in this version: (<a href="https://github.com/jrsoftware/issrc/commit/812a27664fbd767ad870c5c2456df9e4f43676d9#diff-cd0edf55eb9daa93e632d6d4d86a91d8">View differences in Default.isl</a>).
+  <li>Some messages have been added in this version: (<a href="https://github.com/jrsoftware/issrc/commit/66df4cb6478ffe3bde4ff94f901089366b0358ec">View differences in Default.isl</a>).
   <ul>
     <li>FileExistsSelectAction, FileExists2, FileExistsOverwriteExisting, FileExistsKeepExisting, FileExistsOverwriteOrKeepAll: If the FileExists2 message is set by a translation, Setup will instead use these messages instead of the FileExist message to show <a href="https://i.imgur.com/AnF6qo8.png">more user friendly prompts</a> to overwrite or keep existing files if the <tt>confirmoverwrite</tt> flag is set.</li>
     <li>ExistingFileNewerSelectAction, ExistingFileNewer2, ExistingFileNewerOverwriteExisting, ExistingFileNewerKeepExisting, ExistingFileNewerOverwriteOrKeepAll: If the ExistingFileNewer2 message is set by a translation, Setup will instead use these messages instead of the ExistingFileNewer message to show <a href="https://i.imgur.com/vbXFpUE.png">more user friendly prompts</a> to keep or overwrite existing files if the <tt>promptifolder</tt> flag is set.</li>