Fiz umas alterações e funcionou aqui!
<html>
<head>
<!--Load the AJAX API-->
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript">
// Load the Visualization API and the corechart package.
google.charts.load('current', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.charts.setOnLoadCallback(desenharPizza);
// Callback that creates and populates a data table,
// instantiates the pie chart, passes in the data and
// draws it.
function desenharPizza (){
var tabela = new google.visualization.DataTable();
tabela.addColumn('string','categorias');
tabela.addColumn('number','valores');
tabela.addRows([
['Educação',2000],
['Transporte',500],
['Lazer',230],
['Saúde',50],
['Cartão de crédito',900],
['Alimentação',260]
]);
var grafico = new google.visualization.PieChart(document.getElementById('graficoPizza'));
grafico.draw(tabela);
}
</script>
</head>
<body>
<!--Div that will hold the pie chart-->
<div id="graficoPizza"></div>
</body>
</html>