Bug 31488: Update Max checkout text

Bug 31488: Update Max checkout text

This changes text from "you have checked out too many items" to
"You have reached the maximum limit of items checked out".

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 7a90be2ff221df5e7ab575e89063f6e8dcc99c29)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 6ccddb4be15f664f31538d0f0de0e059df03ea3f)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>