Fix typo

docs/dev/01_live_document_types.rst

@@ -35,7 +35,7 @@ to return a context dictionary, which will then be passed to
 the template.
 
 If you need more control over how the PDF is generated, you
-can instead override the ``update`` methodd:
+can instead override the ``update`` method:
 
 .. code-block:: python