fix: this type

packages/svelte/src/main/public.d.ts

@@ -196,7 +196,7 @@ declare const SnippetReturn: unique symbol;
  * You can only call a snippet through the `{@render ...}` tag.
  */
 export interface Snippet<T extends unknown[] = []> {
-	(...args: T): typeof SnippetReturn & {
+	(this: void, ...args: T): typeof SnippetReturn & {
 		_: 'functions passed to {@render ...} tags must use the `Snippet` type imported from "svelte"';
 	};
 }