Tutorial: always call FAQ FAQ

... also in German

Change-Id: I3b3bcc5e70ec4f250cec0d092718812acb7291b2
diff --git a/templates/doc/navigation.json b/templates/doc/navigation.json
index 03315ff..3719190 100644
--- a/templates/doc/navigation.json
+++ b/templates/doc/navigation.json
@@ -95,7 +95,7 @@
     ]
   },
   {
-    "title": "F.A.Q.",
+    "title": "FAQ",
     "id": "faq"
   },
   {