bpo-26184: import.rst: Improve versionchanged note (GH-325) (GH-326)

(cherry picked from commit 1f5639c)

Author: Mariatta

Doc/reference/import.rst

@@ -468,7 +468,7 @@ import machinery will create the new module itself.
 
 .. versionchanged:: 3.6
    An :exc:`ImportError` is raised when ``exec_module()`` is defined but
-   ``create_module`` is not.
+   ``create_module()`` is not.
 
 Submodules
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