[FIX] website_blog: fixed typo in demo data
[FIX] website_blog: fixed typo in demo data

Change is not retroactive to avoid breaking existing translations.
Courtesy of nmi.

dfang/odoo,storm-computers/odoo,hip-odoo/odoo,mkieszek/odoo,laslabs/odoo,sysadminmatmoz/OCB,stephen144/odoo,syci/OCB,tvtsoft/odoo8,Elico-Corp/odoo_OCB,bplancher/odoo,stephen144/odoo,laslabs/odoo,hip-odoo/odoo,dfang/odoo,storm-computers/odoo,sysadminmatmoz/OCB,bplancher/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,Elico-Corp/odoo_OCB,tvtsoft/odoo8,laslabs/odoo,mkieszek/odoo,ygol/odoo,laslabs/odoo,syci/OCB,tvtsoft/odoo8,sysadminmatmoz/OCB,microcom/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,tvtsoft/odoo8,mkieszek/odoo,ygol/odoo,bplancher/odoo,storm-computers/odoo,hip-odoo/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,stephen144/odoo,ygol/odoo,sysadminmatmoz/OCB,microcom/odoo,microcom/odoo,syci/OCB,stephen144/odoo,optima-ict/odoo,microcom/odoo,dfang/odoo,ygol/odoo,sysadminmatmoz/OCB,optima-ict/odoo,dfang/odoo,microcom/odoo,tvtsoft/odoo8,mkieszek/odoo,Elico-Corp/odoo_OCB,optima-ict/odoo,bplancher/odoo,stephen144/odoo,sysadminmatmoz/OCB,optima-ict/odoo,storm-computers/odoo,sysadminmatmoz/OCB,storm-computers/odoo,dfang/odoo,mkieszek/odoo,syci/OCB,tvtsoft/odoo8,mkieszek/odoo,syci/OCB,storm-computers/odoo,bplancher/odoo,hip-odoo/odoo,syci/OCB,microcom/odoo,Elico-Corp/odoo_OCB,optima-ict/odoo,dfang/odoo,optima-ict/odoo,hip-odoo/odoo,stephen144/odoo,ygol/odoo