[IMP] website_blog: Add subtitle in blog view
[IMP] website_blog: Add subtitle in blog view

Only the name was present but it has 2 fields

Closes #14747

bplancher/odoo,ygol/odoo,bplancher/odoo,bplancher/odoo,storm-computers/odoo,ygol/odoo,Elico-Corp/odoo_OCB,hip-odoo/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,ygol/odoo,Elico-Corp/odoo_OCB,ygol/odoo,storm-computers/odoo,storm-computers/odoo,storm-computers/odoo,dfang/odoo,laslabs/odoo,hip-odoo/odoo,bplancher/odoo,dfang/odoo,laslabs/odoo,laslabs/odoo,dfang/odoo,ygol/odoo,bplancher/odoo,ygol/odoo,laslabs/odoo,Elico-Corp/odoo_OCB,storm-computers/odoo,laslabs/odoo,Elico-Corp/odoo_OCB,storm-computers/odoo,hip-odoo/odoo,dfang/odoo,laslabs/odoo,dfang/odoo,hip-odoo/odoo,dfang/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,bplancher/odoo