Fix version in changelog.

Author: Chris Bellew

Voice Control For Plex/src/main/res/xml/changelog.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <changelog>
-    <release version="1.8.1b3" versioncode="15">
+    <release version="1.8.1" versioncode="16">
         <change>Added Pin login.</change>
         <change>Subscribe to player and exit from Now Playing screen if the player stops.</change>
         <change>Improved local client discovery, including support for Roku and clients that have no local server.</change>