Bump Akka.NET to 1.5.1 and update RELEASE_NOTES.md for 1.5.1 (#190)

Author: Arkatufus

RELEASE_NOTES.md

@@ -1,3 +1,7 @@
+### 1.5.1 March 16 2023 ###
+
+* [Update Akka.NET to v1.5.1](https://github.com/akkadotnet/akka.net/releases/tag/1.5.1)
+
 ### 1.5.0 March 2 2023 ###
 
 Version 1.5.0 is the RTM release of Akka.Persistence.PostgreSql and Akka.NET v1.5.0 RTM integration.

src/Directory.Build.props

@@ -14,7 +14,7 @@
   <PropertyGroup>
     <XunitVersion>2.4.2</XunitVersion>
     <XunitRunnerVersion>2.4.5</XunitRunnerVersion>
-    <AkkaVersion>1.5.0</AkkaVersion>
+    <AkkaVersion>1.5.1</AkkaVersion>
     <PostgresLowVersion>5.0.11</PostgresLowVersion>
     <PostgresHighVersion>6.0.7</PostgresHighVersion>
     <PostgresVersion>[$(PostgresLowVersion), $(PostgresHighVersion)]</PostgresVersion>