Bug 32816: Fix cataloguing/value_builder/cn_browser.pl

Bug 32816: Fix cataloguing/value_builder/cn_browser.pl

Use event parameter

This is part of the refactoring happening in bug 30975

Test plan:
1. Verify that the plugin continues to work as before

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit d18772c3c28a339e3f4b59628a477e9c7603e3e0)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit e2344b96e84508530407542856f437e0abadc21c)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 28ff9448fd8ec8e9fa3aeccf4375606a605f47da)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>