Fix dark mode image setting (#923)

Co-authored-by: Emruz Hossain <hossainemruz@gmail.com>

assets/scripts/features/darkmode/index.js

@@ -40,7 +40,7 @@ window.addEventListener('load', async () => {
     // save preference to local storage
     saveScheme(newScheme)
 
-    setImages(newScheme)
+    setImages(theme)
   }
 
   setScheme(loadScheme())