update for name change to Neutron

Note: Nova and Horizon are not updated until those projects have
migrated.

Change-Id: I256ef20e7caadd9c96e6dd908c5d8b69ca5c4aeb
diff --git a/HACKING.rst b/HACKING.rst
index 3fef950..dd665a2 100644
--- a/HACKING.rst
+++ b/HACKING.rst
@@ -110,7 +110,7 @@
 * Global service configuration like ``ENABLED_SERVICES``
 * Variables used by multiple services that do not have a clear owner, i.e.
   ``VOLUME_BACKING_FILE_SIZE`` (nova-volumes and cinder) or ``PUBLIC_NETWORK_NAME``
-  (nova-network and quantum)
+  (nova-network and neutron)
 * Variables that can not be cleanly declared in a project file due to
   dependency ordering, i.e. the order of sourcing the project files can
   not be changed for other reasons but the earlier file needs to dereference a