added v1.5.52 release notes

Directory.Build.props

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <Copyright>Copyright © 2013-$([System.DateTime]::Now.Year) Akka.NET Team</Copyright>
     <Authors>Akka.NET Team</Authors>
-    <VersionPrefix>1.5.34</VersionPrefix>
+    <VersionPrefix>1.5.52</VersionPrefix>
     <PackageIcon>akkalogo.png</PackageIcon>
     <PackageProjectUrl>https://getakka.net/</PackageProjectUrl>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
@@ -50,7 +50,25 @@
     <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
   </PropertyGroup>
   <PropertyGroup>
-    <PackageReleaseNotes>Placeholder for nightlies*</PackageReleaseNotes>
+    <PackageReleaseNotes>**SECURITY PATCH**
+
+Akka.NET v1.5.52 is a security patch containing crucial fixes for enforcing certificate-based authentication using mTLS enforcement. Please see https://getakka.net/articles/remoting/security.html for details on how this works.
+
+* [Akka.Remote: implement mutual TLS authentication support](https://github.com/akkadotnet/akka.net/pull/7851)
+* [Akka.Remote: validate SSL certificate private key access at server startup](https://github.com/akkadotnet/akka.net/pull/7847)
+
+Other fixes:
+
+* [Akka.Cluster.Sharding: ShardedDaemonSets: randomize starting worker index](https://github.com/akkadotnet/akka.net/pull/7857)
+
+1 contributors since release 1.5.51
+
+| COMMITS | LOC+ | LOC- | AUTHOR |
+| --- | --- | --- | --- |
+| 3 | 1193 | 149 | Aaron Stannard |
+
+
+To [see the full set of changes in Akka.NET v1.5.52, click here](https://github.com/akkadotnet/akka.net/milestone/135?closed=1)</PackageReleaseNotes>
   </PropertyGroup>
   <ItemGroup Label="Analyzers" Condition="'$(MSBuildProjectName)' != 'Akka'">
     <PackageReference Include="Akka.Analyzers" Version="$(AkkaAnalyzerVersion)" PrivateAssets="all" />
@@ -72,4 +90,4 @@
     <IncludeSymbols>true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
   </PropertyGroup>
-</Project>
+</Project>

RELEASE_NOTES.md

@@ -1,3 +1,25 @@
+#### 1.5.52 October 6th, 2025 ####
+
+**SECURITY PATCH**
+
+Akka.NET v1.5.52 is a security patch containing crucial fixes for enforcing certificate-based authentication using mTLS enforcement. Please see https://getakka.net/articles/remoting/security.html for details on how this works.
+
+* [Akka.Remote: implement mutual TLS authentication support](https://github.com/akkadotnet/akka.net/pull/7851)
+* [Akka.Remote: validate SSL certificate private key access at server startup](https://github.com/akkadotnet/akka.net/pull/7847)
+
+Other fixes:
+
+* [Akka.Cluster.Sharding: ShardedDaemonSets: randomize starting worker index](https://github.com/akkadotnet/akka.net/pull/7857)
+
+1 contributors since release 1.5.51
+
+| COMMITS | LOC+ | LOC- | AUTHOR |
+| --- | --- | --- | --- |
+| 3 | 1193 | 149 | Aaron Stannard |
+
+
+To [see the full set of changes in Akka.NET v1.5.52, click here](https://github.com/akkadotnet/akka.net/milestone/135?closed=1)
+
 #### 1.5.51 October 1st, 2025 ####
 
 Akka.NET v1.5.51 is a minor patch containing a remoting bug fix and add required codes to support persistence health check.