Merged PR 706489: Update Microsoft.Win32.Registry to 4.4.0

This PR fixes the discrepancy between the artifact services package that requires 4.4.0 version and BuildXL.Utilities that used to require 4.3.0 version. Without this change referencing BUildXL.Utilities package was causing a nuget package downgrade.

Related work items: #2039361

cg/nuget/cgmanifest.json

@@ -2418,7 +2418,7 @@
         "Type": "NuGet",
         "NuGet": {
           "Name": "Microsoft.Win32.Registry",
-          "Version": "4.3.0"
+          "Version": "4.4.0"
         }
       }
     },

config.nuget.dotnetcore.dsc

@@ -122,7 +122,7 @@ export const pkgs = [
     // Packages
     { id: "Microsoft.CSharp", version: pkgVersion },
     { id: "Microsoft.Win32.Primitives", version: pkgVersion },
-    { id: "Microsoft.Win32.Registry", version: pkgVersion },
+    { id: "Microsoft.Win32.Registry", version: "4.4.0" }, // This is the version Artifact Services relies on.
     { id: "System.AppContext", version: pkgVersion },
     { id: "System.Collections", version: pkgVersion },
     { id: "System.Collections.Concurrent", version: pkgVersion },