Bug 34345: 'Circulation and fine rules' vs 'Circulation and fines rules'

Bug 34345: 'Circulation and fine rules' vs 'Circulation and fines rules'

This patch corrects two instances of the phrase "Circulation and fines
rules" in favor of the more common "Circulation and fine rules" for
consistency's sake.

To test, apply the patch and go to Administration.

- In the description under the "Circulation and fine rules" link it
  should read, "Define circulation and fine rules..."
- Open the Circulation and fine rules page and confirm that the link in
  the sidebar menu is correct.

Signed-off-by: Caroline Cyr La Rose <caroline.cyr-la-rose@inlibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>