Node.js tutoria: Use await when calling run()

As it happens, the run() call is the last call in the app, so it also works without
await. But the moment somebody
adds code after run(), they'd be surprised
that it gets called
"before" run. So await for good measure.

docs/tutorial/node/src/main_game_logic.js

@@ -62,6 +62,6 @@ mainWindow.check_if_pair_solved = function () {
     }
 };
 
-mainWindow.run();
+await mainWindow.run();
 
 // ANCHOR_END: game_logic

docs/tutorial/node/src/main_initial.js

@@ -7,6 +7,6 @@ import * as slint from "slint-ui";
 
 let ui = slint.loadFile("./memory.slint");
 let mainWindow = new ui.MainWindow();
-mainWindow.run();
+await mainWindow.run();
 
 // ANCHOR_END: main

docs/tutorial/node/src/main_tiles_from_js.js

@@ -18,6 +18,6 @@ for (let i = tiles.length - 1; i > 0; i--) {
 let model = new slint.ArrayModel(tiles);
 mainWindow.memory_tiles = model;
 
-mainWindow.run();
+await mainWindow.run();
 
 // ANCHOR_END: main