Updated User Scripts (markdown)

User-Scripts.md

@@ -139,7 +139,7 @@ If you want to write your own Lua scripts, have a look at the [documentation of
   This is basically the equivalent (with some caveats) of mpv's built-in antiringing shader.
 
 * **[nnedi3](https://gist.github.com/bjin/4b1ab282412b94200dbe09de998348e6)**  
-  These user shaders are extracted from mpv builtin implementation of `prescale-luma=nnedi3`.
+  These user shaders are extracted from mpv's built-in implementation of `prescale-luma=nnedi3`.
 
 ## VapourSynth Scripts