fix import type

Author: Dudek-AMS

packages/svelte/src/index.d.ts

@@ -113,7 +113,7 @@ export class SvelteComponent<
  * you export a component called `MyComponent`. For Svelte+TypeScript users,
  * you want to provide typings. Therefore you create a `index.d.ts`:
  * ```ts
- * import { Component } from "svelte";
+ * import type { Component } from "svelte";
  * export declare const MyComponent: Component<{ foo: string }> {}
  * ```
  * Typing this makes it possible for IDEs like VS Code with the Svelte extension