fix version in info.xml

Author: Josua Hunziker

appinfo/info.xml

@@ -24,7 +24,7 @@ Note that this app prevents group deletions for groups referenced as Auto Groups
 
 In addition, I plan to add some more features over time, e.g., "Union Groups" - see the [Milestone Plans](https://github.com/stjosh/auto_groups/milestones) for more details.
     </description>
-    <version>1.7.0</version>
+    <version>1.6.2</version>
     <licence>agpl</licence>
     <author mail="der@digitalwerker.ch" >Josua Hunziker</author>
     <namespace>AutoGroups</namespace>