Merge pull request #892 from JonLoy/ticket_20018

Fixed #20018: Added backtick to fix reference

docs/ref/models/fields.txt

@@ -362,7 +362,7 @@ to filter a queryset on a ``BinaryField`` value.
 
     Although you might think about storing files in the database, consider that
     it is bad design in 99% of the cases. This field is *not* a replacement for
-    proper :ref.`static files <static-files> handling.
+    proper :ref:`static files <static-files>` handling.
 
 ``BooleanField``
 ----------------