Added prediction to client doc sample
diff --git a/samples/api-python-client-doc/main.py b/samples/api-python-client-doc/main.py
index 3d12824..b92b18d 100755
--- a/samples/api-python-client-doc/main.py
+++ b/samples/api-python-client-doc/main.py
@@ -68,6 +68,7 @@
       <li><a href='/customsearch/v1'>customsearch</a>
       <li><a href='/diacritize/v1'>diacritize</a>
       <li><a href='/translate/v2'>translate</a>
+      <li><a href='/prediction/v1'>prediction</a>
     </ul>
     """)