Fix link

Author: aberdean

english/sleep/make-another-wish/siri/marshmallow-walls.md

@@ -1,7 +1,7 @@
 Sure! I have a few choices available for your search.
 
 [YouTube](https://www.youtube.com/watch?v=NSkycYIUnLg)
-This song reminded me of something... perhaps, I should [sing a song](sing/sing.md) and try to remember how it all started...
+This song reminded me of something... perhaps, I should [sing a song](../../sing/sing.md) and try to remember how it all started...
 
 [Android](https://material.uplabs.com/posts/android-marshmallow)
 Oh gosh, am I really trapped in an Android app?