Update CHANGELOG

misc/CHANGELOG

@@ -57,6 +57,7 @@
     + Invalid scan type () error (#2785);
     + Invalid CSRF cookie editing rack items (#2556);
     + FPing discovery marks all addresses as alive (#2888);
+    + Subnet usage calculation updated for nested subnets;
     + API:
         + Fixed /user/ calls for SSL with app code (static app code);
         + Address IP field not displayed when using filter_by (#2934);