Refactor RazorPagesTestSample Index.cshtml to fix formatting of the "Add a message" panel title

Author: fatihdurgut

src/Application/src/RazorPagesTestSample/Pages/Index.cshtml

@@ -12,7 +12,7 @@
         <form method="post">
             <div class="panel panel-default">
                 <div class="panel-heading">
-                    <h3 class="panel-title">Add a message</h3>
+                    <h3 class="panel-title">Add a message </h3>
                 </div>
                 <div class="panel-body">
                     <div class="form-group">