docs: Minor link fix in Android U class

Change-Id: Ifab9c8088ba686a560647883cbacdd34c1c08c80

Author: romannurik

docs/html/training/design-navigation/wireframing.jd

@@ -94,7 +94,7 @@ previous.link=ancestral-temporal.html
 </a>
 
 <p class="img-caption"><strong>Figure 5.</strong> Example news application wireframes, for handsets in portrait.
-<strong>(<a href="example-wireframe-tablet.svg">Download SVG</a>)</strong></p>
+<strong>(<a href="example-wireframe-phone.svg">Download SVG</a>)</strong></p>
 
 
 <a href="{@docRoot}images/training/app-navigation-wireframing-wires-tablet.png">