Update RELEASE_NOTES.md for 1.4.42 release

Author: Arkatufus

RELEASE_NOTES.md

@@ -1,5 +1,6 @@
-#### 1.4.31 December 21 2021 ####
-* Updated to [Akka.NET v1.4.31](https://github.com/akkadotnet/akka.net/releases/tag/1.4.31)
+#### 1.4.42 September 23 2022 ####
+* Updated to [Akka.NET v1.4.42](https://github.com/akkadotnet/akka.net/releases/tag/1.4.42)
+* [Bump Serilog from 2.10.0 to 2.12.0](https://github.com/akkadotnet/Akka.Logger.Serilog/pull/191)
 
 #### 1.4.26 October 7 2021 ####
 * Updated to [Akka.NET v1.4.26](https://github.com/akkadotnet/akka.net/releases/tag/1.4.26)