release notes for 2.1.28; enable deterministic builds in release

Directory.Build.props

@@ -26,6 +26,10 @@
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
+    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Nerdbank.GitVersioning" Version="3.0.50" PrivateAssets="all" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="all"/>

docs/ReleaseNotes.md

 # Release Notes
 
+## 2.1.28
+
+- fix: stability in new sentinel APIs
+- fix: include `SslProtocolos` in `ConfigurationOptions.ToString()` (#1408 via vksampath and Sampath Vuyyuru
+- fix: clarify messaging around disconnected multiplexers (#1396)
+- change: tweak methods of new sentinel API (this is technically a breaking change, but since this is a new API that was pulled quickly, we consider this to be acceptable)
+- add: new thread`SocketManager` mode (opt-in) to always use the regular thread-pool instead of the dedicated pool
+- add: improved counters in/around error messages
+- build: enable deterministic builds
+
 ## 2.1.0
 
 - fix: ensure active-message is cleared (#1374 via hamish-omny)