Change social-info OARS value to 'moderate'

This closes #11

data/writeas-gtk.appdata.xml

@@ -69,7 +69,7 @@
     <content_attribute id="language-humor">none</content_attribute>
     <content_attribute id="language-discrimination">none</content_attribute>
     <content_attribute id="social-chat">none</content_attribute>
-    <content_attribute id="social-info">none</content_attribute>
+    <content_attribute id="social-info">moderate</content_attribute>
     <content_attribute id="social-audio">none</content_attribute>
     <content_attribute id="social-location">none</content_attribute>
     <content_attribute id="social-contacts">none</content_attribute>