Lower order of transmission extension so as not to override IOR

loaders/src/glTF/2.0/Extensions/KHR_materials_transmission.ts

@@ -31,7 +31,7 @@ export class KHR_materials_transmission implements IGLTFLoaderExtension {
     /**
      * Defines a number that determines the order the extensions are applied.
      */
-    public order = 190;
+    public order = 175;
 
     private _loader: GLTFLoader;