Remove <> from <RECIPE> in node-creator manpage

As title. <> is unnecessary. Remove them.

Change-Id: Id715ec78688df4e27e9874844f90a6be00ce6637
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=890276
Signed-off-by: Ryan Barry <rbarry@redhat.com>