Updated the URL from _ to - on send sms page

app/templates/send-sms.html

@@ -0,0 +1,21 @@
+{% extends "admin_template.html" %}
+
+{% block page_title %}
+GOV.UK Notify | Send text messages
+{% endblock %}
+
+{% block content %}
+
+<div class="grid-row">
+	<div class="column-two-thirds">
+		<h1 class="heading-xlarge">Send text messages</h1>
+
+		<p>This page will be where we construct text messages</p>
+
+  	<p>
+  	<a class="button" href="check-sms" role="button">Continue</a>
+  	</p>
+	</div>
+</div>
+
+{% endblock %}