Update download link

Author: tmorrell

templates/appendix.tmpl

@@ -31,7 +31,7 @@ ${endif}
             </div>
             <div class="book-appendix-download">
                 <a download rel="noopener" href="https://data.caltech.edu/tindfiles/serve/7e4791bc-2449-4629-b948-d771b4d0773f/" class="landing-page-start-button">Download Edition 1.0 - full version</a>
-                <a download rel="noopener" href="https://data.caltech.edu/tindfiles/serve/75758782-29ec-41f0-85e7-a7501cac625e/" class="landing-page-start-button">Download Edition 1.0 - light version</a>
+                <a download rel="noopener" href="https://data.caltech.edu/tindfiles/serve/e8a42663-3234-42c9-91e9-9b4828e77cf0/" class="landing-page-start-button">Download Edition 1.0 - light version</a>
             </div>
         ${endif}
 
@@ -43,4 +43,4 @@ ${if(chapter)}
     ${else}
         <a class="book-page-nav hidden">&#8250;</a>
     ${endif}
-${endif}
+${endif}