PEP 615: Fix Sphinx warnings (#4905)

Author: Secrus

peps/pep-0615.rst

@@ -930,16 +930,14 @@ References
 
 Other time zone implementations:
 --------------------------------
+* ``dateutil.tz.win``: Concrete time zone implementations wrapping Windows
+    time zones
+    https://dateutil.readthedocs.io/en/stable/tzwin.html
 
 .. [#dateutil-tz]
     ``dateutil.tz``
     https://dateutil.readthedocs.io/en/stable/tz.html
 
-.. [#dateutil-tzwin]
-    ``dateutil.tz.win``: Concrete time zone implementations wrapping Windows
-    time zones
-    https://dateutil.readthedocs.io/en/stable/tzwin.html
-
 .. [#pytz]
     ``pytz``
     http://pytz.sourceforge.net/