small changes in changelog (additional annotators were added)

CHANGELOG

 minerva (12.0.0~alpha.0) unstable; urgency=medium
-  * Feature: support for tair annotations
+  * Feature: support for STRING, STITCH, KEGG, CAZy, BRENDA  annotators
   * Feature: annotations contain info about source (there is difference
     between manual and automatically added annotations)
   * Feature: default permission for new projects are configurable