Update dependencies from https://github.com/dotnet/arcade build 475 (#29)

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.18577.9

eng/Version.Details.xml

@@ -2,9 +2,9 @@
 <Dependencies>
   <ProductDependencies></ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.18576.5">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.18577.9">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>5b019cda4f53a3380ec7405628e9fa0a3b17a0d9</Sha>
+      <Sha>085cb30bcceacc3dd2fdb563800b4b02bc71d02d</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>

global.json

@@ -4,6 +4,6 @@
     "vswhere": "2.5.2"
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.18576.5"
+    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.18577.9"
   }
 }