update manifest with staging packages

Packages/manifest.json

 {
+  "registry": "https://staging-packages.unity.com",
   "dependencies": {
     "com.unity.ads": "2.0.8",
     "com.unity.analytics": "3.0.9",
-    "com.unity.subsystemregistration": "file:/Users/jimmy/Documents/Projects/DevUnity/XR/subsystemregistration",
+    "com.unity.subsystemregistration": "1.0.0-preview.4",
-    "com.unity.xr.arfoundation": "file:/Users/jimmy/Documents/Projects/DevUnity/XR/arfoundation",
-    "com.unity.xr.arkit": "file:/Users/jimmy/Documents/Projects/DevUnity/XR/upm-xr-arkit",
-    "com.unity.xr.facesubsystem": "file:/Users/jimmy/Documents/Projects/DevUnity/XR/xrfacesubsystem",
+    "com.unity.xr.arfoundation": "1.0.0-preview.21",
+    "com.unity.xr.arkit": "1.0.0-preview.18",
+    "com.unity.xr.facesubsystem": "1.0.0-preview.3",
     "com.unity.modules.ai": "1.0.0",
     "com.unity.modules.animation": "1.0.0",
     "com.unity.modules.assetbundle": "1.0.0",

ProjectSettings/EditorBuildSettings.asset

   m_ObjectHideFlags: 0
   serializedVersion: 2
   m_Scenes:
-  - enabled: 1
+  - enabled: 0
+  - enabled: 0
+    path: Assets/Scenes/FaceTracking/FaceMeshScene.unity
+    guid: 047514b96a5d44d6bb0acbfa06ace943
   m_configObjects: {}