Bug 29155: Update links to jQuery and jQuery Migrate files

Bug 29155: Update links to jQuery and jQuery Migrate files

With these patches, jQuery versions in the OPAC and staff interface are
both updated to 3.6.0. The latest version of jQuery Migrate is installed
to allow us to take a slower approach to updating out-of-date syntax.

To test, apply the patch and try as many pages as you can, paying
attention to the browser console to watch for errors.

Signed-off-by: David Cook <dcook@prosentient.com.au>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>