fix missing angle bracket

Author: kay-kim

source/tutorial/create-an-auto-incrementing-field.txt

@@ -49,7 +49,7 @@ contains the last value of the sequence.
 
 #. Create a ``getNextSequence`` function that accepts a ``name`` of the
    sequence. The function uses the :method:`findAndModify()
-   <db.collection.findAndModify()` method to atomically increment the
+   <db.collection.findAndModify()>` method to atomically increment the
    ``seq`` value and return this new value:
 
    .. code-block:: javascript