Update version number to v12.31.9

Command executed by: FarawayVision#4854

version-info.xml

 <version-info>
-    <current version="12.31.8" />
+    <current version="12.31.9" />
     <changelog>
+        <version number="12.31.9" timestamp="1565035598734">Dialogue and posing updates for Zone-tan.</version>
         <version number="12.31.8" timestamp="1565019262245">Dialogue updates and bug fixes for Caulifla.</version>
         <version number="12.31.7" timestamp="1565012217285">Dialogue updates for Meia.</version>
         <version number="12.31.6" timestamp="1564975214692">Model updates for Chihiro and dialogue updates for Leafy.</version>