Update dependencies from https://github.com/dotnet/arcade build 20210916.4 (#1666)

Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.GenAPI , Microsoft.DotNet.Helix.Sdk
 From Version 7.0.0-beta.21463.4 -> To Version 7.0.0-beta.21466.4
Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

eng/Version.Details.xml

 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="7.0.0-beta.21463.4">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="7.0.0-beta.21466.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>4b7c80f398fd3dcea03fdc4e454789b61181d300</Sha>
+      <Sha>734d875ba2abfb5c8f5f52368e7d4711ee366e31</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="7.0.0-beta.21463.4">
+    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="7.0.0-beta.21466.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>4b7c80f398fd3dcea03fdc4e454789b61181d300</Sha>
+      <Sha>734d875ba2abfb5c8f5f52368e7d4711ee366e31</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.GenAPI" Version="7.0.0-beta.21463.4">
+    <Dependency Name="Microsoft.DotNet.GenAPI" Version="7.0.0-beta.21466.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>4b7c80f398fd3dcea03fdc4e454789b61181d300</Sha>
+      <Sha>734d875ba2abfb5c8f5f52368e7d4711ee366e31</Sha>
     </Dependency>
   </ToolsetDependencies>
   <!-- ProductDependencies -->

eng/Versions.props

@@ -4,7 +4,7 @@
     <!-- Disabling the check for End of live TFMs since we still target netcoreapp 2.1 -->
     <CheckEolTargetFramework>false</CheckEolTargetFramework>
     <PreReleaseVersionLabel>prerelease</PreReleaseVersionLabel>
-    <MicrosoftDotNetGenAPIPackageVersion>7.0.0-beta.21463.4</MicrosoftDotNetGenAPIPackageVersion>
+    <MicrosoftDotNetGenAPIPackageVersion>7.0.0-beta.21466.4</MicrosoftDotNetGenAPIPackageVersion>
     <!-- dotnet/corefx dependencies -->
     <SystemDrawingCommonPackageVersion>5.0.2</SystemDrawingCommonPackageVersion>
     <SystemIOPortsPackageVersion>5.0.1</SystemIOPortsPackageVersion>

global.json

@@ -12,7 +12,7 @@
     "version": "6.0.100-rc.1.21430.12"
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "7.0.0-beta.21463.4",
-    "Microsoft.DotNet.Helix.Sdk": "7.0.0-beta.21463.4"
+    "Microsoft.DotNet.Arcade.Sdk": "7.0.0-beta.21466.4",
+    "Microsoft.DotNet.Helix.Sdk": "7.0.0-beta.21466.4"
   }
 }