Fix html version of case-studies

Signed-off-by: Christopher Guindon chris.guindon@eclipse-foundation.org

layouts/case-studies/single.html

-<!-- 
-  Copyright (c) 2018 Eclipse Foundation, Inc.
-
-  This program and the accompanying materials are made available under the
-  terms of the Eclipse Public License v. 2.0 which is available at
-  http://www.eclipse.org/legal/epl-2.0.
-
-  Contributors:
-    Christopher Guindon <chris.guindon@eclipse-foundation.org>
-
-  SPDX-License-Identifier: EPL-2.0
--->
{{ define "main" }}
<main class="main">
<div class="well">