new URL for best practices

the redirect from the old URL is broken :-(

Author: mr-c

src/main/resources/templates/about.html

@@ -136,7 +136,7 @@ <h2>Where is information exposed?</h2>
 		<section id="best-practice">
             <h1>Best Practices</h1>
             <p>In order to ensure that your workflow is well presented in CWL Viewer, we recommend the following of
-            <a href="http://www.commonwl.org/user_guide/rec-practices/">CWL Best Practices</a>. Those which are
+            <a href="https://www.commonwl.org/user_guide/topics/best-practices.html">CWL Best Practices</a>. Those which are
                 specifically relevant to the viewer are detailed below, but it is suggested that you try to meet as
                 many as possible to include the general quality and reproducibility of your workflows.</p>
             <p>Some limitations of the CWL Viewer which you may need to be aware of are also described here.</p>