Fix documentation typo

Signed-off-by: Filipe Laíns <[email protected]>

Author: FFY00

Doc/library/site.rst

@@ -55,7 +55,7 @@ added path for configuration files.
    :data:`sys.exec_prefix` on :ref:`sys-path-init-virtual-environments`. This is
    now done during the :ref:`path initialization <sys-path-init>`. As a result,
    under :ref:`sys-path-init-virtual-environments`, :data:`sys.prefix` and
-   :data:`sys.exec_prefix` no longer depend on the :ref:`site` initialization,
+   :data:`sys.exec_prefix` no longer depend on the :mod:`site` initialization,
    and are therefore unaffected by :option:`-S`.
 
 .. _site-virtual-environments-configuration: