[1.3.X] Fixed #16580 - Typo in docs/ref/models/querysets.txt

...and would also pull in the ``building`` relation.

You can refer to any ``ForeignKey`` or ``OneToOneField`` relation in

the list of fields passed to ``select_related``. Ths includes foreign

the list of fields passed to ``select_related``. This includes foreign

keys that have ``null=True`` (unlike the default ``select_related()``

call). It's an error to use both a list of fields and the ``depth``

parameter in the same ``select_related()`` call, since they are