Bug 11918 : Fix typo on authorized values page

Bug 11918 : Fix typo on authorized values page

This is a small string patch. On Authorized values this patch fixes
the wording next to the library limit.

To test:

Visit Authorized Values
Click 'Add new' or 'Edit' next to a value
Make sure that the text next to the library filter is right

Signed-off-by: Aleisha <aleishaamohia@hotmail.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Text change, works as described.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>