Update dependencies from https://github.com/dotnet/arcade build 20201223.1

Microsoft.DotNet.Arcade.Sdk
 From Version 6.0.0-beta.20621.12 -> To Version 6.0.0-beta.20623.1

eng/Version.Details.xml

@@ -3,9 +3,9 @@
   <ProductDependencies>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="6.0.0-beta.20621.12">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="6.0.0-beta.20623.1">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>3ba79fbd73d6765b67d0f75ac9dac148d6bea346</Sha>
+      <Sha>7e0f9bc02f83d0a561d9edb963d856334f048f0d</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>

global.json

@@ -13,7 +13,7 @@
     }
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "6.0.0-beta.20621.12",
+    "Microsoft.DotNet.Arcade.Sdk": "6.0.0-beta.20623.1",
     "Microsoft.DotNet.Helix.Sdk": "2.0.0-beta.19069.2"
   }
 }