Use SSL to load the downloads page

Change-Id: I20c0459acf3e39374b1980e8208919233deb6037
diff --git a/navbar.md b/navbar.md
index 6c194e1..b898c61 100644
--- a/navbar.md
+++ b/navbar.md
@@ -2,7 +2,7 @@
 
 * [About](about.md)
 * [Documentation](https://gerrit-documentation.storage.googleapis.com/Documentation/2.11/index.html)
-* [Downloads](http://gerrit-releases.storage.googleapis.com/index.html)
+* [Downloads](https://gerrit-releases.storage.googleapis.com/index.html)
 * [Issues](https://code.google.com/p/gerrit/issues/list)
 * [Source](https://gerrit.googlesource.com/gerrit/)
 * [Reviews](https://gerrit-review.googlesource.com/#/q/status:open+project:gerrit)