tweak message

Author: Rich-Harris

documentation/docs/98-reference/.generated/shared-errors.md

@@ -33,7 +33,7 @@ Here, `List.svelte` is using `{@render children(item)` which means it expects `P
 ### invalid_snippet_arguments
 
 ```
-A snippet function was passed invalid arguments. A snippet function should only be called via `{@render ...}`
+A snippet function was passed invalid arguments. Snippets should only be instantiated via `{@render ...}`
 ```
 
 ### lifecycle_outside_component

packages/svelte/messages/shared-errors/errors.md

@@ -28,7 +28,7 @@ Here, `List.svelte` is using `{@render children(item)` which means it expects `P
 
 ## invalid_snippet_arguments
 
-> A snippet function was passed invalid arguments. A snippet function should only be called via `{@render ...}`
+> A snippet function was passed invalid arguments. Snippets should only be instantiated via `{@render ...}`
 
 ## lifecycle_outside_component