more incorrect filenames in 912 dataset

[cyberjunk]

Sorry, missed these in my last ticket:

Note the additional before .xlsx:

wrong:   spreadsheet/591-29/2_591-29_input .xlsx
correct: spreadsheet/591-29/2_591-29_input.xlsx

Note the additional before .xlsx:

wrong:   spreadsheet/371-33/2_371-33_input .xlsx
correct: spreadsheet/371-33/2_371-33_input.xlsx

Note the additional before .xlsx:

wrong:   spreadsheet/36478/2_36478_input .xlsx
correct: spreadsheet/36478/2_36478_input.xlsx