Add a link to Javadoc.

Change-Id: I00c705538385dd1d8a20138fc886c2e0a87f0dd5
diff --git a/index.html b/index.html
index ae97809..dcffdb4 100755
--- a/index.html
+++ b/index.html
@@ -74,7 +74,7 @@
                         <a href="#contribute">Contribute</a>
                     </li>
                     <li>
-                        <a href="javadoc/7.0.0">JavaDoc</a>
+                        <a href="javadoc/7.0.0">Javadoc</a>
                     </li>
                     <li class="dropdown">
                         <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"
diff --git a/ja/index.html b/ja/index.html
index 227e9b9..7419795 100644
--- a/ja/index.html
+++ b/ja/index.html
@@ -75,7 +75,7 @@
                     <a href="#contribute">Contribute</a>
                 </li>
                 <li>
-                    <a href="../javadoc/7.0.0">JavaDoc</a>
+                    <a href="../javadoc/7.0.0">Javadoc</a>
                 </li>
                 <li class="dropdown">
                     <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"