update doc

Author: trueadm

sites/svelte-5-preview/src/routes/docs/content/01-api/02-runes.md

@@ -207,8 +207,8 @@ nested effects that you want to manually control. This rune also allows for crea
 </script>
 ```
 
-The `$effect.root` can be used from anywhere, but if it's used nested within another active effect (such as during component initialisation)
-then it might be desirable to know when that active effect gets disposed and cleaned up. `$effect.root` takes an optional second arugment,
+If the `$effect.root` was created within within another active effect (such as during component initialisation) then it might
+be desirable to know when that active effect gets disposed and cleaned up. `$effect.root` takes an optional second arugment,
 which is a function callback for when this happens in case. This allows you to cleanup the effect root too if needed.
 
 ```svelte