Update strings_payee.xml

Changed:
<string name="spending_by_payee">Movimentos por beneficiário</string> If this is the text that appears on the left reports menu above the payees i think it must be changed because despesas (it's only what we have payed to this guys and on the report menu we can choice what we have spend and/or we have received from a payee so it must to be Movimentos....