T&F: roman numeral bibcodes not being generated correctly

[csgrant00]

python run.py -p "/proj/ads/abstracts/data/T+F/TF.080823/gfer20.v611.i01/00150193.2023.2211239.xml" -t jats -f tf.test

python run.py -p "/proj/ads/abstracts/data/T+F/TF.080823/unse20.v197.i08/00295639.2023.2216600.xml" -t jats -f tf.test