[BUG] - Input files for TIARA-BC are out of date

[dodu94]

Describe the bug
During the post-processing of Tiara-BC weird results appeared (like missing tallies). After a long investigation, me and @AlbertoBittes understood that this comes from a mismatch between Tiara post-processing code (MultipleSpectrum class) which was correctly taken from the old windows dev branch, and the TIARA input files that were not updated accordingly. This is the missing commit: 3e564eb

@AlbertoBittes will take care of that with an hotfix to the main branch