Update changelog

CHANGELOG.rst

@@ -6,14 +6,21 @@ Changes
 
 * NEW: Add "forced" option to the session destruction API (#250)
 
-* IMPROVE: Support project/repository/tag pagination for rescan-images (#252)
+* NEW: Backport "etcd forget-image" manager CLI command from the master and add "forget_image" GraphQL
+  mutation for super-admins.
+
+* IMPROVE: Support project/repository/tag pagination in rescan-images for Docker registries with a large
+  number of images and tags (#252)
 
 * FIX: Strip owner-access-key argument when checking API params for input validation
   with query parameters (#251)
 
 * FIX: Potential SQL syntax error during synchronizing real-time statistics from Redis to DB caused when
   no statistics data is available.
 
+* FIX: Add missing privilege checks for some of GraphQL mutation APIs and improve logging for GraphQL
+  queries and mutations using graphene middleware. (#254)
+
 19.09.18 (2020-03-08)
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