changelog updated

CHANGELOG

 minerva (12.3.0~alpha.0) unstable; urgency=low
   * Feature: annotators are more flexible - you can define set of input and
     outputs used by annotator (#617)
+  * Feature: changes in admin panel doesn't require saving - they are saved
+    automatically (#676)
   * Small improvement: validation of the organism and disease id on map upload
     added (#618)
   * Small improvement: added current username next to logout button in admin