change format string to warning

Author: akuhlens

flang/lib/Semantics/check-call.cpp

@@ -802,7 +802,7 @@ static void CheckExplicitDataArg(const characteristics::DummyDataObject &dummy,
         !evaluate::HasVectorSubscript(actual)) {
       context.Warn(common::UsageWarning::VolatileOrAsynchronousTemporary,
           messages.at(),
-          "The array section '%s' should not be associated with %s with %s attribute, unless the dummy is assumed-shape or assumed-rank"_port_en_US,
+          "The array section '%s' should not be associated with %s with %s attribute, unless the dummy is assumed-shape or assumed-rank"_warn_en_US,
           actual.AsFortran(), dummyName,
           dummyIsAsynchronous ? "ASYNCHRONOUS" : "VOLATILE");
       volatileOrAsyncNeedsTempDiagnosticIssued = true;