Bump Akka.NET to 1.5.0 RTM and update RELEASE_NOTES.md for 1.5.0RTM release (#216)

Author: Arkatufus

RELEASE_NOTES.md

@@ -1,2 +1,5 @@
-#### 1.5.0-beta5 February 28 2023 ####
-* Updated to [Akka.NET v1.5.0-beta5](https://github.com/akkadotnet/akka.net/releases/tag/1.5.0-beta5)
+#### 1.5.0 March 2 2023 ####
+
+Version 1.5.0 is the RTM release of Akka.Logger.Serilog and Akka.NET v1.5.0 RTM integration.
+
+* Updated to [Akka.NET v1.5.0](https://github.com/akkadotnet/akka.net/releases/tag/1.5.0)

src/common.props

@@ -16,7 +16,7 @@
     <XunitRunnerVersion>2.4.5</XunitRunnerVersion>
     <TestSdkVersion>17.5.0</TestSdkVersion>
     <NBenchVersion>2.0.1</NBenchVersion>
-    <AkkaVersion>1.5.0-beta6</AkkaVersion>
+    <AkkaVersion>1.5.0</AkkaVersion>
     <NetCoreTestVersion>netcoreapp3.1</NetCoreTestVersion>
     <NetFrameworkTestVersion>net471</NetFrameworkTestVersion>
     <NetStandardLibVersion>netstandard2.0</NetStandardLibVersion>