Mozilla Thunderbird -> v68.6.0

thunderbird.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <packages>
 
-<package id="thunderbird" name="Mozilla Thunderbird" revision="%version%.2" reboot="false" priority="0">
+<package id="thunderbird" name="Mozilla Thunderbird" revision="%version%.1" reboot="false" priority="0">
 
 	<!-- NB: we've had problems with major version bumps which sometimes change the format of options
 			 we add in chemistry-prefs.js. Thus, we tie that to a version, and please test carefully when
        upgrading -->
 
- <variable name="version" value="68.5.0" />
+ <variable name="version" value="68.6.0" />
  <variable name="prefsversion" value="68" />
-
  <check type="uninstall" condition="versiongreaterorequal" path="Mozilla Thunderbird.*" value="%version%" />
 
   <install cmd='"%software%\thunderbird\Thunderbird Setup %version%.exe" -ms' />