Fixed example for macOS menu (#3847)

* Fixed example for macOS menu

* Update changelog.mdx

website/docs/reference/menus.mdx

@@ -15,15 +15,21 @@ An example of how to create a menu:
     app := NewApp()
 
     AppMenu := menu.NewMenu()
+    if runtime.GOOS == "darwin" {
+        AppMenu.Append(menu.AppMenu()) // On macOS platform, this must be done right after `NewMenu()`
+    }
     FileMenu := AppMenu.AddSubmenu("File")
-    FileMenu.AddText("&Open", keys.CmdOrCtrl("o"), openFile)
+    FileMenu.AddText("&Open", keys.CmdOrCtrl("o"), func(_ *menu.CallbackData) {
+        // do something
+    })
     FileMenu.AddSeparator()
     FileMenu.AddText("Quit", keys.CmdOrCtrl("q"), func(_ *menu.CallbackData) {
-        runtime.Quit(app.ctx)
+        // `rt` is an alias of "github.com/wailsapp/wails/v2/pkg/runtime" to prevent collision with standard package
+        rt.Quit(app.ctx)
     })
 
     if runtime.GOOS == "darwin" {
-	AppMenu.Append(menu.EditMenu())  // on macos platform, we should append EditMenu to enable Cmd+C,Cmd+V,Cmd+Z... shortcut
+	AppMenu.Append(menu.EditMenu())  // On macOS platform, EditMenu should be appended to enable Cmd+C, Cmd+V, Cmd+Z... shortcuts
     }
 
     err := wails.Run(&options.App{

website/src/pages/changelog.mdx

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - Fixed cross compilation failed with CGO [PR](https://github.com/wailsapp/wails/pull/3795) by [@fcying](https://github.com/fcying)
 - Using go-webview2 v0.1.17 to fix native webview2loader issue, by @leaanthony
+- Fixed example for macOS menu by @takuyahara in [PR](https://github.com/wailsapp/wails/pull/3847)
 
 ### Changed
 - Allow to specify macos-min-version externally. Implemented by @APshenkin in [PR](https://github.com/wailsapp/wails/pull/3756)