fix(leptos): fix reactivity warnings (#568)

Author: amrbashir

.changes/leptos-warning-reactiity.md

@@ -0,0 +1,6 @@
+---
+"create-tauri-app": "patch"
+"create-tauri-app-js": "patch"
+---
+
+Fix warnings in `leptos` template related to reactivity.

templates/template-leptos/src/app.rs.lte

@@ -28,11 +28,12 @@ pub fn App() -> impl IntoView {
     let greet = move |ev: SubmitEvent| {
         ev.prevent_default();
         spawn_local(async move {
-            if name.get().is_empty() {
+            let name = name.get_untracked();
+            if name.is_empty() {
                 return;
             }
 
-            let args = to_value(&GreetArgs { name: &name.get() }).unwrap();
+            let args = to_value(&GreetArgs { name: &name }).unwrap();
             // Learn more about Tauri commands at https://tauri.app/v1/guides/features/command
             let new_msg = invoke("greet", args).await.as_string().unwrap();
             set_greet_msg.set(new_msg);