Fix wrong link.

Author: RKrahl

doc/src/usage.rst

@@ -51,8 +51,6 @@ set:
 
 .. literalinclude:: ../examples/named.py
 
-.. _usage-parametrized:
-
 Using test classes
 ------------------
 
@@ -68,6 +66,8 @@ build from the name of the class and the respective method in this
 case, while in `TestClassNamed` these names are overridden by an
 explicit name argument to the :func:`pytest.mark.dependency` marker.
 
+.. _usage-parametrized:
+
 Parametrized tests
 ------------------