Add helper text for required fields

Signed-off-by: Natalia Luzuriaga <natalia.luzuriaga@cms.hhs.gov>

Author: natalialuzuriaga

index.html

@@ -281,11 +281,13 @@ <h3 class="usa-heading margin-top-neg-05 margin-bottom-1" id="quiz-subheading">
 	</div>
 
 	<!-- Form header -->
-	<div id="form-subheader">
+	<div class="form-subheader">
 		<div class="step-header">
 			<div class="step-number">3</div>
 			<h2>Complete the entire form to generate the code.json file</h2>
 		</div>
+		<p class="usa-heading margin-top-neg-05 margin-bottom-2"><em>A red asterisk (<span style="color:red">*</span>)
+				indicates a required field</em></p>
 	</div>
 
 	<div id="formio"></div>