Flip the model direction for visionOS example

Co-authored-by: tatsuya-ogawa <tatsuya-ogawa@users.noreply.github.com>

Author: tattn

Example/VisionExample/VisionExampleApp.swift

@@ -48,8 +48,8 @@ final class AppModel {
 
         var initialRotation: Float {
             switch self {
-            case .alicia: return 0
-            case .vrm1: return .pi
+            case .alicia: return .pi
+            case .vrm1: return 0
             }
         }
     }