title: How do you set the font size of a Chart Title with Python PPTX?
body: <p>I add a chart with:</p>
  
  <pre><code>doughnutchart_data.add_series('YTD COMPLETION TO PLAN', (PerformancePercent, NotPerformedPercent))
  </code></pre>
  
  <p>This gives me a chart title with the text, but how do I change the font size?
  This:</p>
  
  <pre><code>ThisDoughnutChart.title.font.size = Pt(12)
  </code></pre>
  
  <p>Gives me this error:
  AttributeError: 'Chart' object has no attribute 'title'</p>