Update PFConstants.m

Author: bmueller

Parse/Parse/Source/PFConstants.m

@@ -17,6 +17,8 @@
 NSString *const kPFDeviceType = @"tvos";
 #elif TARGET_OS_WATCH
 NSString *const kPFDeviceType = @"applewatch";
+#elif TARGET_OS_VISION
+NSString *const kPFDeviceType = @"vision";
 #endif
 
 NSString *const PFParseErrorDomain = @"Parse";