Tweak Changes wording s/GVSV/DEFSV/

Author: timbunce

Changes

@@ -13,7 +13,7 @@ DBI::Changes - List of significant changes to the DBI
     Changed t/42prof_data.t more informative
     Changed $sth->{TYPE} to be NUMERIC in DBD::File drivers as per the
         DBI docs. Note TYPE_NAME is now also available. [H.Merijn Brand]
-    Fixed compilation error on bleadperl due GVSV no longer being an lvalue
+    Fixed compilation error on bleadperl due DEFSV no longer being an lvalue
         [Dagfinn Ilmari Manns�ker]
 
     Added docs for escaping placeholders using a backslash.