[FIX] doc: Improve english
[FIX] doc: Improve english

Some rephrasing to slightly improve the docs.
Closes #11652

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