Switch scoped registries to OpenUPM (#787)

Co-authored-by: Mike Miller <[email protected]>
Co-authored-by: Mike Nisbet <[email protected]>
Co-authored-by: Mike Nisbet <[email protected]>

Author: 3 people

Packages/manifest.json

@@ -70,7 +70,10 @@
       "name": "OpenUPM",
       "url": "https://package.openupm.com",
       "scopes": [
-        "com.atteneder"
+        "com.atteneder",
+        "org.nuget.google",
+        "org.nuget.sharpziplib",
+        "org.nuget.system"
       ]
     },
     {
@@ -80,15 +83,6 @@
         "com.htc.upm"
       ]
     },
-    {
-      "name": "Unity NuGet",
-      "url": "https://unitynuget-registry.azurewebsites.net",
-      "scopes": [
-        "org.nuget.google",
-        "org.nuget.sharpziplib",
-        "org.nuget.system"
-      ]
-    },
     {
       "name": "Meta XR",
       "url": "https://npm.developer.oculus.com",