fix: add xr input source hand check to prevent hand tracking model loading on connect (#29179)

Co-authored-by: jorodi <jorodi@mpb16>

examples/jsm/webxr/XRControllerModelFactory.js

@@ -239,7 +239,7 @@ class XRControllerModelFactory {
 
 			const xrInputSource = event.data;
 
-			if ( xrInputSource.targetRayMode !== 'tracked-pointer' || ! xrInputSource.gamepad ) return;
+			if ( xrInputSource.targetRayMode !== 'tracked-pointer' || ! xrInputSource.gamepad || xrInputSource.hand ) return;
 
 			fetchProfile( xrInputSource, this.path, DEFAULT_PROFILE ).then( ( { profile, assetPath } ) => {