Fix indendation level of versionchanged directive in configparser.items() doc (GH-7543)

Author: andresdelfino

Doc/library/configparser.rst

@@ -1091,10 +1091,10 @@ ConfigParser Objects
       given *section*.  Optional arguments have the same meaning as for the
       :meth:`get` method.
 
-   .. versionchanged:: 3.8
-      Items present in *vars* no longer appear in the result.  The previous
-      behaviour mixed actual parser options with variables provided for
-      interpolation.
+      .. versionchanged:: 3.8
+         Items present in *vars* no longer appear in the result.  The previous
+         behaviour mixed actual parser options with variables provided for
+         interpolation.
 
 
    .. method:: set(section, option, value)