fix(file-uploader): update clearFiles accessor description (#1122)

The `clearFiles` prop description currently reads "Override the default behavior of clearing the array of uploaded files."

This is misleading as `clearFiles` is a component accessor, not a `let` prop.

types/FileUploader/FileUploader.svelte.d.ts

@@ -79,7 +79,7 @@ export default class FileUploader extends SvelteComponentTyped<
   {}
 > {
   /**
-   * Override the default behavior of clearing the array of uploaded files
+   * Programmatically clear the uploaded files
    */
   clearFiles: () => void;
 }