Fix parquet filename regex
for https://huggingface.co/datasets/GalaktischeGurke/full_dataset_1509_lines_invoice_contract_mail_GPT3.5_test/discussions/1#64da13ff3a7ab21ea7c45e63
Fix parquet filename regex: for https://huggingface.co/datasets/GalaktischeGurke/full_dataset_1509_lines_invoice_contract_mail_GPT3.5_test/discussions/1#64da13ff3a7ab21ea7c45e63