added v1.4.10 release notes (#4546)

RELEASE_NOTES.md

@@ -1,5 +1,17 @@
-#### 1.4.10 July 21 2020 ####
-**Placeholder for nightlies**
+#### 1.4.10 August 20th 2020 ####
+**Maintenance Release for Akka.NET 1.4**
+
+Akka.NET v1.4.10 includes some minor bug fixes and some major feature additions to Akka.Persistence.Query:
+
+* [Fixed: Akka.Persistence.Sql SqlJournal caching all Persistence Ids in memory does not scale](https://github.com/akkadotnet/akka.net/issues/4524)
+* [Fixed Akka.Persistence.Query PersistenceIds queries now work across all nodes, rather than local node](https://github.com/akkadotnet/akka.net/pull/4531)
+* [Akka.Actor: Akka.Pattern: Pass in clearer error message into OpenCircuitException](https://github.com/akkadotnet/akka.net/issues/4314)
+* [Akka.Persistence: Allow persistence plugins to customize JournalPerfSpec's default values](https://github.com/akkadotnet/akka.net/pull/4544)
+* [Akka.Remote: Racy RemotingTerminator actor crash in Akka.Remote initialization](https://github.com/akkadotnet/akka.net/issues/4530)
+
+To see the [full set of fixes in Akka.NET v1.4.10, please see the milestone on Github](https://github.com/akkadotnet/akka.net/milestone/41).
+
+
 
 #### 1.4.9 July 21 2020 ####
 **Maintenance Release for Akka.NET 1.4**
@@ -13,7 +25,7 @@ Akka.NET v1.4.9 features some important bug fixes for Akka.NET v1.4:
 * [Akka.Cluster: Cluster event listener that logs all events](https://github.com/akkadotnet/akka.net/pull/4502)
 * [Akka.Cluster.Tools.Singleton.ClusterSingletonManager bug: An element with the same key but a different value already exists](https://github.com/akkadotnet/akka.net/issues/4474)
 
-To see the [full set of fixes in Akka.NET v1.4.8, please see the milestone on Github](https://github.com/akkadotnet/akka.net/milestone/40).
+To see the [full set of fixes in Akka.NET v1.4.9, please see the milestone on Github](https://github.com/akkadotnet/akka.net/milestone/40).
 
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