Correct exception handling for COMPOSITESCALINGAUTO

[yspolyakov]

In ckksrns-parametergeneration.cpp, the following code

        else if (compositeDegree == 1 && registerWordSize < 64) {
            OPENFHE_THROW(
                "This COMPOSITESCALING* version does not support composite degree == 1 with register size < 64.");
        }

needs to be changed to include the edge case of registerWordSize = 64.