cleanup: trim trailing whitespace (#11136)

* cleanup: trim trailing whitespace

* update(`.editorconfig`)

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/frontend/src/pages/follow.vue

@@ -20,7 +20,7 @@ async function follow(user): Promise<void> {
 		window.close();
 		return;
 	}
-	
+
 	os.apiWithDialog('following/create', {
 		userId: user.id,
 	});