docs(quick-start): add <form> tag to quick start example (#467)

docs/framework/react/quick-start.md

@@ -25,6 +25,13 @@ export default function App() {
   return (
     <div>
       <form.Provider>
+        <form
+          onSubmit={(e) => {
+            e.preventDefault();
+            e.stopPropagation();
+            void form.handleSubmit();
+          }}
+        >
           <div>
             <form.Field
               name="fullName"
@@ -39,6 +46,7 @@ export default function App() {
             />
           </div>
           <button type="submit">Submit</button>
+        </form>
       </form.Provider>
     </div>
   )