website/content/installation: build syncbased for tutorials

A new syncbase-related tutorial has been added.
This change ensures that syncbased has been built by the
step-by-step section of the tutorials.

Change-Id: Ia4e91d9f394a0a432da21b9fd731ec11ce13bc7c
diff --git a/content/installation/step-by-step.md b/content/installation/step-by-step.md
index 1b6e011..ab042ca 100644
--- a/content/installation/step-by-step.md
+++ b/content/installation/step-by-step.md
@@ -149,7 +149,7 @@
 <!-- @installVanadiumBinaries @test -->
 ```
 # Install specific tools needed for the tutorials.
-jiri go install v.io/x/ref/cmd/... v.io/x/ref/services/agent/... v.io/x/ref/services/mounttable/...
+jiri go install v.io/x/ref/cmd/... v.io/x/ref/services/agent/... v.io/x/ref/services/mounttable/... v.io/x/ref/services/syncbase/...
 ```
 
 # Verifying installation