[FIX] point_of_sale: long product name print receipt in safari

Before this commit, when printing in safari a receipt that contains
products with long names, parts of the name were overlapped. This occurs
because, in safari, the library that transforms the html into text
mismanages the spaces.
This is a well known problem, see : niklasvh/html2canvas#1654

Now, the name is printed correctly in safari, same behaviour than the
others browsers.

opw-2169656

closes odoo/odoo#44819

X-original-commit: 263131f4
Signed-off-by: Jorge Pinna Puissant (jpp) <jpp@odoo.com>