Add placement as default project in index webpage

Change-Id: I101ade5368fbdf108906e89e1c3ba03a46cd6f35
diff --git a/doc/source/overview.rst b/doc/source/overview.rst
index 2479cd0..a609333 100644
--- a/doc/source/overview.rst
+++ b/doc/source/overview.rst
@@ -64,7 +64,8 @@
 
 The default services configured by DevStack are Identity (keystone),
 Object Storage (swift), Image Service (glance), Block Storage
-(cinder), Compute (nova), Networking (neutron), Dashboard (horizon)
+(cinder), Compute (nova), Placement (placement),
+Networking (neutron), Dashboard (horizon).
 
 Additional services not included directly in DevStack can be tied in to
 ``stack.sh`` using the :doc:`plugin mechanism <plugins>` to call