[IMP] website_slide: update demo data
[IMP] website_slide: update demo data

Newly Added Videos: 1) Odoo Website & E-commerce Demonstration.
                    2) Odoo All-in-One Software Demonstration.
                    3) Odoo Sign Demonstration.

dfang/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo,dfang/odoo,hip-odoo/odoo,ygol/odoo,dfang/odoo,dfang/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo,dfang/odoo,dfang/odoo