[FIX] website_slides: use bigger image for shared content
[FIX] website_slides: use bigger image for shared content

Before this commit, share a slide was done with a small picture and so ugly

closes odoo/odoo#34133

Signed-off-by: Jérémy Kersten (jke) <56923a0c9ca793c07ff1df1013de5694062a27a6@openerp.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo