Bug 27411: Update tools/automatic_item_modification_by_age.tt to reflect ACC2

Bug 27411: Update tools/automatic_item_modification_by_age.tt to reflect ACC2

This patch changes instances of type="number" in inputs to adhere to
ACC2 guidelines

Test plan:
Open the file and ensure all instances of type="number" in inputs are
changed to 'type="text" inputmode="numeric" pattern="[0-9]*"'

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>