api-ref: Fix wrong bold decoration
api-ref: Fix wrong bold decoration

In the 'DELETE /os-floating-ips/{floating_ip_id}' API,
"Error response codes: badRequest(400), unauthorized(401),
forbidden(403)," is bold.
But it should not be bold.
So fix it.

TrivialFix
Change-Id: Ic2d1ae2856406600c9dd3273d21dd2f18e56c1e9

gooddata/openstack-nova,rahulunair/nova,openstack/nova,mahak/nova,klmitch/nova,mikalstill/nova,mikalstill/nova,rahulunair/nova,klmitch/nova,mahak/nova,rahulunair/nova,mahak/nova,gooddata/openstack-nova,openstack/nova,klmitch/nova,gooddata/openstack-nova,openstack/nova,gooddata/openstack-nova,klmitch/nova,mikalstill/nova