title: Can't change "heading 1" font name using docx
body: <p>I am using the following script :</p>
  
  <pre><code>header = self.document.add_paragraph(style='Heading 1')
  header.style.font.name = 'Arial'
  header.style.font.size = Pt(16)
  header.add_run('Header One')
  </code></pre>
  
  <p>The result is that "Header One" get 'Calibri'. </p>