fix(cart): update gdc-client help text

- Closes #1130

app/scripts/cart/templates/cart.html

@@ -30,8 +30,8 @@ <h4 class="panel-title" data-translate>How to download files in my Cart?</h4>
           </div>
           <div style="padding: 10px">
             <p data-translate>
-              <strong>Download Manifest File</strong>: Downloading and analyzing large BAMs or large number of files can be very resource intensive. The GDC High-Performance Download Client, called Parcel, provides such means of transferring large amounts of data across high-speed networks in the most efficient manner possible. Download the manifest file and use it with the GDC High-Performance Download Client. For more info, click
-               <a target="_blank" href="https://gdc.nci.nih.gov/access-data/gdc-high-performance-download-client">here</a>.
+              <strong>Download Manifest File</strong>: Downloading and analyzing large BAMs or large number of files can be very resource intensive and so it is recommended to use the GDC Client for this purpose. The GDC Client provides several different download modes to provide the most efficient transfer possible. For more info, click 
+               <a target="_blank" href="https://gdc.nci.nih.gov/node/7967">here</a>.
             </p>
             <p data-translate>
               <strong>Download Cart (Web Browser)</strong>: Download Files in your Cart directly from the Web Browser.