[FIX] website: rename sitemap-1 to sitemap if only one file.
[FIX] website: rename sitemap-1 to sitemap if only one file.

Old code was duplicating the sitemap if less than LOC_PER_SITEMAP urls

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