feat(demo): update example code boolean attrributes

apps/demo/src/pages/index.astro

@@ -99,13 +99,14 @@ const theme = "dark";
 const submit: Submit = {
   name: "submit",
   type: "submit",
+  value: "Let's go!",
 };
 ---
 
 <Layout title={title} theme={theme}>
   <Form
-    validateOnLoad={true}
-    showValidationHints={true}
+    validateOnLoad
+    showValidationHints
     formGroups={form}
     theme={theme}
     submitControl={submit}

apps/demo/src/pages/job-application.astro

@@ -99,6 +99,7 @@ const resume: ControlConfig = {
 const submit: Submit = {
   name: "submit",
   type: "submit",
+  value: "Let's go!",
 };
 
 const values = {
@@ -119,7 +120,7 @@ skillsForm.controls.push(new FormControl(resume));
 
 <Layout title="Programmer Job Application">
   <Form
-    showValidationHints={true}
+    showValidationHints
     formGroups={[infoForm, skillsForm]}
     submitControl={submit}
   />

apps/demo/src/pages/pizza-delivery.astro

@@ -92,8 +92,5 @@ infoForm.get("contact")?.setValidators([Validators.minLength(9)]);
 ---
 
 <Layout title="Pizza Form Demo">
-  <Form
-    showValidationHints={true}
-    formGroups={[baseForm, toppingsForm, infoForm]}
-  />
+  <Form showValidationHints formGroups={[baseForm, toppingsForm, infoForm]} />
 </Layout>