Fix typo in PyDict_Items doc

Doc/api/concrete.tex

@@ -1948,7 +1948,7 @@ format.
 
 \begin{cfuncdesc}{PyObject*}{PyDict_Items}{PyObject *p}
   Returns a \ctype{PyListObject} containing all the items from the
-  dictionary, as in the dictinoary method \method{items()} (see the
+  dictionary, as in the dictionary method \method{items()} (see the
   \citetitle[../lib/lib.html]{Python Library Reference}).
 \end{cfuncdesc}