Add dynamic rendering updates to HelloVue component

Updated the template to include new expressions: uppercase transformation of 'hello', a static calculation, and a call to a newly added 'helloFunction'. These changes enhance the component's interactivity and display capabilities.

Author: khannedy

src/components/HelloVue.vue

@@ -9,10 +9,18 @@ const data = {
 };
 
 const buttonDisabled = false;
+
+function helloFunction(){
+  return "Hello World";
+}
 </script>
 
 <template>
-  <h1 v-bind="data">{{hello}}</h1>
+  <h1 v-bind="data">{{hello.toUpperCase()}}</h1>
+
+  <h2>{{ 100 * 200 }}</h2>
+
+  <h2>{{helloFunction()}}</h2>
 
   <div :class="data.class" v-html="hello"></div>