[FIX] doc: remove reference to website_less
[FIX] doc: remove reference to website_less

No more module website_less needed to create a theme
Fixes #8182

sysadminmatmoz/OCB,stephen144/odoo,bplancher/odoo,laslabs/odoo,dfang/odoo,hip-odoo/odoo,hip-odoo/odoo,laslabs/odoo,dfang/odoo,microcom/odoo,ygol/odoo,storm-computers/odoo,ygol/odoo,microcom/odoo,laslabs/odoo,hip-odoo/odoo,laslabs/odoo,stephen144/odoo,dfang/odoo,stephen144/odoo,laslabs/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,sysadminmatmoz/OCB,ygol/odoo,stephen144/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,dfang/odoo,storm-computers/odoo,bplancher/odoo,sysadminmatmoz/OCB,Elico-Corp/odoo_OCB,sysadminmatmoz/OCB,hip-odoo/odoo,ygol/odoo,dfang/odoo,storm-computers/odoo,sysadminmatmoz/OCB,sysadminmatmoz/OCB,dfang/odoo,storm-computers/odoo,hip-odoo/odoo,bplancher/odoo,microcom/odoo,hip-odoo/odoo,Elico-Corp/odoo_OCB,bplancher/odoo,stephen144/odoo,microcom/odoo,Elico-Corp/odoo_OCB,storm-computers/odoo,microcom/odoo,storm-computers/odoo,bplancher/odoo,ygol/odoo,microcom/odoo,ygol/odoo,stephen144/odoo,bplancher/odoo,ygol/odoo,sysadminmatmoz/OCB